BMW Vehicle Models X4 2014-2018 Torque Specifications
BMW Vehicle Models X4 2014-2018

BMW Vehicle Models X4 2014-2018 Torque Specifications

Complete BMW Vehicle Models X4 2014-2018 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

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Search by component name, bolt size, or description

Torque Calculator

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2.0l Engine

Torque specifications for 2.0L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 20 ft-lbs (27 N·m) 2. 90° 3. 90°
Important Notes
Multi-stage torque procedure required. Tighten in sequence starting from the center working outwards. Angle values are for final tightening.
2

Camshaft Bearing Cap Bolts

M8 x 1.25
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 90°
Important Notes
Multi-stage torque plus angle procedure required. Tighten in sequence. Angle value is for final tightening.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper alignment before tightening. Tighten evenly.

Crankshaft And Connecting Rods

1

Main Bearing Bolts

M10 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Tighten in sequence. Ensure correct bearing cap orientation.
2

Connecting Rod Nuts

M9 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper rod cap orientation. Tighten evenly.
3

Flywheel Bolts

M12 x 1.5
Torque Specification
55 ft-lbs (74 N·m)
Important Notes
Apply thread locker. Tighten in a star pattern.
4

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Specification
1. 90 ft-lbs (122 N·m) 2. 60°
Important Notes
Use new bolt. Multi-stage torque procedure required. Angle value is for final tightening.

Engine Timing

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure tensioner is properly positioned before tightening.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Ensure camshaft timing is correct before tightening.

Engine External

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
8.75 ft-lbs (12 N·m)
Important Notes
Tighten evenly in a cross pattern to prevent leaks. Inch lbs converted to ft lbs
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Do not overtighten to avoid damage to the valve cover. Tighten in sequence.
3

Oil Filter Cap

N/A
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Hand tighten with appropriate tool. Do not over tighten.
4

Oil Filter Housing Bolt

N/A
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Hand tighten with appropriate tool. Do not over tighten. Estimated Value.
5

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new washer.
6

Water Pump Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly in a cross pattern.
7

Water Pump Pulley Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly. Do not over tighten.
8

Thermostat Housing Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly to prevent leaks.

Intake And Exhaust

1

Throttle Body Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper alignment. Do not overtighten.
2

Intake Manifold Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly in a cross pattern to prevent vacuum leaks.
3

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use new gaskets. Tighten in a cross pattern.
4

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Use new gaskets. Tighten in a cross pattern.
5

Intake Manifold Runner Control Valve Bolts/Actuator Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not over tighten. Estimated Value.
6

EGR Valve Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper seal before tightening. Do not overtighten.

Fuel And Ignition

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly. Ensure proper fuel line connection.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure injector is correctly seated before tightening. Do not overtighten.
3

Fuel Injector Rail Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper seal. Do not overtighten.
4

Spark Plugs

M14 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Use anti-seize compound on threads. Do not overtighten.
5

Ignition Coil Bolt

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper connection. Do not overtighten.

Sensors

1

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly positioned before tightening. Estimated Value.
2

Coolant Temperature Sensor Bolt/Nut

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper sealing. Do not overtighten. Estimated Value.
3

Knock Sensor Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure sensor is seated correctly. Estimated Value.
4

Oil Pressure Sensor Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Do not overtighten. Estimated Value.

3.0l Engine

Torque specifications for 3.0L Engine

Cylinder Head and Valvetrain

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)

Engine Block and Crankshaft

1

Main Bearing Bolts

M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
2

Connecting Rod Nuts

M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
3

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Specification
90 ft-lbs (122 N·m)

Timing System

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
60 ft-lbs (81 N·m)

Intake and Exhaust Systems

1

Intake Manifold Bolts

M10 x 1.5
Torque Specification
10 ft-lbs (14 N·m)
2

Exhaust Manifold/Header Bolts

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
3

Throttle Body Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)

Accessory Components

1

Water Pump Bolts

M10 x 1.5
Torque Specification
10 ft-lbs (14 N·m)
2

Water Pump Pulley Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
3

Thermostat Housing Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)

8hp Transmission

Torque specifications for 8hp Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Torque all bolts to spec. Ensure proper alignment of the transmission before final tightening.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8.75 ft-lbs (12 N·m)
Important Notes
Use a cross-tightening pattern to ensure even pressure on the gasket. DO NOT overtighten.

Drain And Fill Plugs

1

Transmission Drain/Fill Plugs

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Always replace the crush washer. Do not overtighten. Use a calibrated torque wrench.

Mechatronics Unit

1

Mechatronics Unit Mounting Bolts

M6 x 1.0
Torque Specification
5.2 ft-lbs (7.1 N·m)
Important Notes
Use a cross-tightening pattern to ensure even pressure and sealing. DO NOT overtighten.

Torque Converter

1

Transmission to Torque Converter Bolts

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Always use NEW torque converter bolts. Torque in a star pattern. Replace bolts upon removal.

Transmission Cooler Lines

1

Transmission Cooler Line Fittings

N/A - Fitting
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated torque value. Check specific application for exact value. Ensure fittings are properly aligned and not cross-threaded. Alternatively, hand-tight plus 1/4 turn
2

Transmission Cooler Line Bracket Bolts

M6 x 1.0
Torque Specification
8.75 ft-lbs (12 N·m)
Important Notes
These bolts secure the brackets holding the transmission cooler lines. Torque to specified value. If these bolts are of a larger size, refer to transmission mounting bolts.

Valve Body Internal

1

Valve Body Bolts

M5 x 0.8
Torque Specification
3.3 ft-lbs (4.47 N·m)
Important Notes
Torque all bolts evenly using a cross-tightening pattern. Estimated value. DO NOT over-tighten. Proper cleaning and handling are needed during this delicate assembly.

Speed Sensor

1

Transmission Speed Sensor Bolt

M6 x 1.0
Torque Specification
5.2 ft-lbs (7.1 N·m)
Important Notes
Do not over-tighten, can cause damage. Ensure sensor is seated properly.

Wiring Harness

1

Transmission Wiring Harness Mounting Bolts

M6 x 1.0
Torque Specification
5.2 ft-lbs (7.1 N·m)
Important Notes
Ensure harness is properly routed and secured before tightening bolts.

Body

Torque specifications for Body

Wheels And Tires

1

Wheel Lug Nuts

M14 x 1.25
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Torque lug nuts in a star pattern to ensure even clamping force.

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the straps are correctly positioned before tightening.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Do not overtighten, as this can damage the filler neck.

Exterior Panels

1

Front Bumper Cover Mounting Bolts/Screws

M6 x 1.0
Torque Specification
8.3 ft-lbs (11.3 N·m)
Important Notes
Estimated value, some screws may require less torque. Check for correct panel alignment.
2

Rear Bumper Cover Mounting Bolts/Screws

M6 x 1.0
Torque Specification
8.3 ft-lbs (11.3 N·m)
Important Notes
Estimated value, some screws may require less torque. Check for correct panel alignment.
3

Fender Mounting Bolts/Screws

M6 x 1.0
Torque Specification
8.3 ft-lbs (11.3 N·m)
Important Notes
Estimated value, torque may vary based on location and if using screws.

Hood And Hatch

1

Hood/Bonnet Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Ensure proper hood alignment and smooth operation.
2

Tailgate/Liftgate Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Ensure proper liftgate alignment and smooth operation.

Doors

1

Door Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Ensure proper door alignment and smooth operation.
2

Door Latch/Striker Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Adjust the striker for proper door closure.

Lighting

1

Headlight Assembly Mounting Bolts/Screws

M6 x 1.0
Torque Specification
7.5 ft-lbs (10.2 N·m)
Important Notes
Estimated value. Do not overtighten, which can damage the headlight assembly.
2

Taillight Assembly Mounting Bolts/Screws

M6 x 1.0
Torque Specification
7.5 ft-lbs (10.2 N·m)
Important Notes
Estimated value. Do not overtighten, which can damage the taillight assembly.

Mirrors

1

Side Mirror Mounting Bolts/Screws

M6 x 1.0
Torque Specification
6.6 ft-lbs (9 N·m)
Important Notes
Estimated value. Ensure mirror is correctly positioned before tightening.

Brakes

Torque specifications for Brakes

Caliper Mounting

1

Caliper Mounting Bracket Bolts

M12 x 1.75
Torque Specification
100 ft-lbs (136 N·m)
Important Notes
These bolts secure the caliper mounting bracket to the steering knuckle or hub assembly. Ensure threads are clean and lightly lubricated. Torque evenly.
2

Brake Caliper Bolts (Caliper to Bracket)

M10 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
These bolts secure the brake caliper to the mounting bracket. Ensure threads are clean and lightly lubricated. Torque evenly.

Caliper Components

1

Caliper Guide Pin Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These bolts secure the guide pins of the brake caliper. Over-tightening can bind the caliper; under-tightening can lead to looseness. Ensure pins are lubricated with appropriate caliper grease.
2

Brake Line Fitting (Banjo Bolt)

M10 x 1.0
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
This bolt secures the brake line to the caliper. Always use new copper crush washers. Ensure proper alignment to prevent leaks. Do not overtighten.
3

Brake Caliper Bleeder Screw

M7 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
This screw is used for bleeding the brake system. Do not overtighten, which can damage the bleeder valve. Often, hand-tight followed by a slight snug with a wrench.

Rotor Mounting

1

Brake Disc/Drum Retaining Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
These bolts hold the rotor or drum in place during assembly, not critical for clamping force during braking. These prevent lateral runout. Do not overtighten.
2

Brake Rotor Set Screw

M5 x 0.8
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
A small screw that helps to hold the rotor in position before wheel install. Do not overtighten or strip the threads.

Drivetrain

Torque specifications for Drivetrain

Flywheel

1

Flywheel Bolts

M12 x 1.5
Torque Specification
55 ft-lbs (74 N·m)
Important Notes
Ensure flywheel mating surfaces are clean and free of debris. Use new bolts if specified by the manufacturer.
2

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Tighten the bolts evenly in a star pattern to prevent distortion of the pressure plate. Ensure the clutch disc is properly aligned before tightening.

Transmission

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Ensure the transmission is properly aligned before tightening. Check for any signs of thread damage and replace bolts if necessary.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8.75 ft-lbs (12 N·m)
Important Notes
Use a new gasket and tighten in a criss-cross pattern to ensure an even seal. Do not over tighten.
3

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use a new sealing washer. Be careful not to overtighten the plugs, which could damage the threads.

Transfer Case

1

Transfer Case Mounting Bolts

M10 x 1.5
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Ensure proper alignment before tightening. Verify bolt threads are in good condition.
2

Transfer Case Drain and Fill Plugs

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer. Be careful not to overtighten the plugs, which could damage the threads.

Driveshaft

1

Propeller/Drive Shaft Bolts

M10 x 1.5
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Tighten evenly to prevent vibration. Inspect flex discs (if equipped) for wear before installation.
2

Center Support Bearing Bolts

M8 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Check for proper driveshaft alignment before tightening the bolts. Inspect the rubber mount for degradation.

Differential

1

Differential Mounting Bolts

M12 x 1.75
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure proper alignment before tightening. Use new bolts if necessary.
2

Differential Drain/Fill Plug

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use a new sealing washer. Do not overtighten to avoid damaging the threads.

Axles

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Ensure the axle is seated properly before tightening. Use new bolts if specified by the manufacturer.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
180 ft-lbs (244 N·m)
Important Notes
This is a critical torque value that affects wheel bearing preload. Use new nut if specified by manufacturer and ensure proper axle alignment.
3

Input Shaft / Output Shaft Flange Nut

M18 x 1.5
Torque Specification
120 ft-lbs (163 N·m)
Important Notes
Ensure shaft and flange are properly aligned prior to tightening the nut.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Mounting Bolt

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure coil is properly seated before tightening. Over-tightening may damage coil or mounting points.

Starting System

1

Starter Motor Mounting Bolt

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure starter is correctly aligned before tightening. Check for proper gear engagement.

Charging System

1

Alternator Mounting Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of the alternator before tightening. Do not overtighten.

Battery System

1

Battery Terminal Nut

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten; terminals can easily be damaged. Ensure clean contacts.

Engine Control System

1

Engine Control Unit (ECU/DME) Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
ECU is a sensitive component; do not overtighten. Ensure proper electrical grounding.
2

Crankshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Sensor must be flush against mounting surface. Do not overtighten.
3

Camshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Sensor must be flush against mounting surface. Do not overtighten.

Grounding System

1

Ground Strap Bolt to Body/Chassis

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure grounding surfaces are clean and free from corrosion. Proper torque ensures good electrical contact.

Wiring System

1

Wiring Harness Connector Mounting Bolt

M4 x 0.7
Torque Specification
0.416 ft-lbs (0.6 N·m)
Important Notes
Estimated torque. Overtightening will damage connector.

Power Distribution

1

Fuse Box/Relay Box Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the box is seated properly before tightening. Do not overtighten.

Abs System

1

ABS Wheel Speed Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure sensor is flush against mounting surface. Do not overtighten.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust System

1

Exhaust Manifold to Cylinder Head Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Tighten bolts in a star pattern to ensure even pressure. Ensure to use the correct gasket and proper seating before tightening.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper alignment of the exhaust pipe to prevent leaks. Always use new gaskets or seals if available.
3

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure that the catalytic converter is aligned properly to the exhaust pipe to prevent any leaks. Use new gaskets if available.
4

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper alignment and use new gaskets or seals if available. These bolts can be susceptible to corrosion.
5

Oxygen (O2) Sensor

M18 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Ensure the threads of the sensor and bung are clean. Do not overtighten, as it may damage the sensor. Torque spec is based on typical O2 sensors of this thread size. A specific torque value for the exact sensor should be used if available.
6

NOx Sensor Mounting Bolts

M6 x 1.0
Torque Specification
6.2 ft-lbs (8.5 N·m)
Important Notes
These sensors are often fragile, use caution during installation and do not overtighten. Torque value is an estimate, follow manufacturers recommendations if available

Intake System

1

Mass Air Flow (MAF) Sensor Mounting Bolts

M5 x 0.8
Torque Specification
6.2 ft-lbs (8.5 N·m)
Important Notes
Ensure the sensor is properly aligned. These are generally small bolts, avoid overtightening. Torque value is an estimate, follow manufacturers recommendations if available.
2

Intake Air Temperature (IAT) Sensor Mounting Screw/Retainer

M4 x 0.7
Torque Specification
2.95 ft-lbs (4 N·m)
Important Notes
IAT sensors are usually screwed into a plastic intake manifold. Use caution during installation. Torque is an estimate and should not overtightened. If a plastic clip is used it should be firmly clipped in.

Egr System

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure the EGR valve and manifold surfaces are clean. Use new gaskets if available. Tighten evenly to prevent leaks.

Dpf System

1

Differential Pressure Sensor Mounting Bolts

M6 x 1.0
Torque Specification
6.2 ft-lbs (8.5 N·m)
Important Notes
DPF sensors are often fragile. Install carefully and do not overtighten. Torque is an estimate, follow the manufacturers recommendations if available.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even clamping pressure. Use new gaskets.
2

Exhaust Manifold/Headers Main Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even clamping pressure. Use new gaskets.

Exhaust Piping

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper alignment before tightening. Use new gaskets.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper alignment of the catalytic converter. Use new gaskets.
3

Exhaust Flange Bolts/Nuts (M8)

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Typical torque for M8 flange bolts. Use new gaskets and ensure even clamping.
4

Exhaust Flange Bolts/Nuts (M10)

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Typical torque for M10 flange bolts. Use new gaskets and ensure even clamping.
5

Exhaust Flange Bolts/Nuts (M12)

M12 x 1.75
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Typical torque for M12 flange bolts. Use new gaskets and ensure even clamping.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper muffler alignment and use new gaskets. May vary based on model.

Sensors

1

Oxygen Sensor

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Hand-tighten, then tighten 1/4 turn (approx 25 ft-lbs or 34 N·m). Do not over-tighten, which can damage the sensor.

Mounting

1

Exhaust Hanger Bracket Bolts/Nuts (Small)

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque value for smaller hanger bracket bolts. Ensure the rubber isolators are properly installed.
2

Exhaust Hanger Bracket Bolts/Nuts (Large)

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Torque value for larger hanger bracket bolts. Ensure the rubber isolators are properly installed.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten bolts in a cross pattern to ensure even clamping force.
2

Fuel Injector Mounting Bolts

M5 x 0.8
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure injectors are seated correctly before tightening.
3

Fuel Rail Line Connection Bolt/Fitting

M12 x 1.5
Torque Specification
1. 18 ft-lbs (24 N·m)
Important Notes
Use a crows foot wrench if needed, to apply the correct torque. Ensure the fitting is not cross-threaded before tightening. Torque may vary based on fitting type, confirm specific vehicle manual for exact specs.
4

Fuel Pressure Sensor Mounting Bolt

M5 x 0.8
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not overtighten, this can cause damage to the sensor, use new seals/O-rings for installation.

Fuel Pump

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the pump is correctly seated against the mounting surface.
2

High-Pressure Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value, confirm with vehicle service manual. This is for models with a separate high-pressure pump.
3

Fuel Level Sending Unit Mounting Bolts

M4 x 0.7
Torque Specification
4 ft-lbs (6 N·m)
Important Notes
Very low torque specification. Use a torque wrench that indicates in-lbs to ensure the proper torque is applied to the sending unit, estimated value based on small bolt sizes.

Fuel Tank

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Tighten strap bolts evenly to ensure the tank is properly secured. Ensure all mounting points are properly aligned before tightening.
2

Fuel Filler Neck Mounting Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure the filler neck is seated properly with a new seal/gasket to prevent leaks.
3

Fuel Tank Drain Plug Bolt/Nut

M14 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Always use a new sealing washer with each installation to prevent leaks. Estimated value, confirm with specific vehicle service manual.

Fuel Filter

1

Fuel Filter Mounting Bolt/Nut

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure the fuel filter is correctly seated in its bracket, and new seals or crush washers are used for all fittings.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure bolts are tightened evenly. Use a calibrated torque wrench for accurate readings.

Ac Lines

1

A/C Line Fittings

Varies by location, typically M10-M18
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Hand tight is approximately 10 ft-lbs (14 N·m). Avoid over-tightening. Use a flare nut wrench for proper engagement. Consider the O-ring material when torquing.

Ac Condenser

1

A/C Condenser Mounting Bolts/Nuts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value. Ensure bolts are tightened evenly to prevent condenser damage. Some vehicles may use nuts instead of bolts. Verify torque sequence if applicable to your model.

Ac Evaporator

1

A/C Evaporator Core Housing Bolts/Screws

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value. Be careful when tightening screws into plastic housings to avoid cracking. A torque screwdriver is highly recommended.

Heater Core

1

Heater Core Mounting Bolts/Screws

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value. Take care not to over-tighten as this could cause damage to the housing or heater core. A torque screwdriver is highly recommended for this process.

Blower Motor

1

HVAC Blower Motor Mounting Bolts/Screws

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value. Ensure motor is flush with the housing to avoid vibration. A torque screwdriver is recommended.

Control Module

1

HVAC Control Module Mounting Bolts/Screws

M4 x 0.7
Torque Specification
4.5 ft-lbs (6 N·m)
Important Notes
Estimated value. These components are often made of plastic so be sure to not over-tighten. A torque screwdriver is recommended.

Blend Door Actuator

1

HVAC Blend Door Actuator Mounting Screws

M4 x 0.7
Torque Specification
3.5 ft-lbs (5 N·m)
Important Notes
Estimated value. These fasteners go into plastic and may require a torque screwdriver to avoid over-tightening.

Expansion Valve

1

Expansion Valve Mounting Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Be careful not to over tighten as this can cause damage to the component or the O-rings. Apply thread lubricant per manufacturer recommendation.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Applies to bolts securing the strut assembly to the knuckle and chassis. Ensure bolts are clean and threads are in good condition.
2

Strut Top Mount Nuts

M10 x 1.25
Torque Specification
1. 35 ft-lbs (47 N·m) 2. 90°
Important Notes
These nuts secure the strut top mount to the vehicle body. Torque to the specified value, and then rotate an additional 90 degrees. Always replace these fasteners with new parts.
3

Control Arm Bolts

M14 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Secures the control arm to the subframe and suspension knuckle. Ensure the vehicle is at ride height when tightening.
4

Ball Joint Nut

M12 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Attaches the ball joint stud to the suspension knuckle or control arm. Do not overtighten.
5

Tie Rod End Nut

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Fastens the tie rod end to the steering knuckle. Ensure proper alignment before tightening.
6

Sway Bar Link Nut

M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Connects the sway bar link to the sway bar and strut/control arm. Do not overtighten. These are often torque-to-yield and must be replaced with new fasteners.
7

Front Sway Bar Mounting Bracket Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Secures the sway bar brackets to the subframe or chassis. Ensure equal torque on both sides.

Rear Suspension

1

Rear Upper Control Arm Bolts (to body/subframe)

M14 x 1.5
Torque Specification
1. 85 ft-lbs (115 N·m) 2. 90°
Important Notes
Bolts securing the upper control arm to the body or subframe. Ensure vehicle is at ride height before final torque. Always use new hardware.
2

Rear Lower Control Arm Bolts (to knuckle)

M14 x 1.5
Torque Specification
1. 85 ft-lbs (115 N·m) 2. 90°
Important Notes
Attaches the lower control arm to the suspension knuckle. Ensure vehicle is at ride height before final torque. Always use new hardware.
3

Rear Toe Arm Bolts (to body/subframe and knuckle)

M12 x 1.5
Torque Specification
1. 60 ft-lbs (81 N·m) 2. 60°
Important Notes
Connects the toe arm to the body/subframe and knuckle. Ensure vehicle is at ride height. Always use new hardware.
4

Rear Trailing Arm Bolt (to subframe)

M14 x 1.5
Torque Specification
1. 74 ft-lbs (100 N·m) 2. 90°
Important Notes
Secures the trailing arm to the subframe. Ensure vehicle is at ride height. Always use new hardware.

Sway Bar

1

Anti-Roll Bar Bushing Clamp Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the sway bar bushings to the vehicle chassis. Ensure bushings are properly positioned before tightening.

Wheel And Hub

1

Wheel Speed Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Mounts the wheel speed sensor to the knuckle or hub. Do not overtighten, as this is a small bolt.
2

Hub/Knuckle Mounting Bolts

M14 x 1.5
Torque Specification
1. 85 ft-lbs (115 N·m) 2. 90°
Important Notes
Secures the hub or knuckle to the control arms or suspension assembly. Always replace fasteners. Ensure vehicle is at ride height.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What IS the proper torque specification for lug nuts on a 2017 BMW X4?

The proper torque specification for lug nuts on a 2017 BMW X4 IS 140 Nm (103 lb-ft).

Q2

What type of torque wrench should I use for suspension bolts?

It IS recommended to use a torque wrench with a range of 10-250 Nm for suspension bolts.

Q3

IS it necessary to use thread locker when tightening engine bolts?

Yes, it IS recommended to apply thread locker to engine bolts to prevent loosening due to vibrations.

Q4

What IS the recommended torque for the crankshaft pulley bolt?

The crankshaft pulley bolt on a 2014-2018 BMW X4 requires a torque of 250 Nm (184 lb-ft).

Q5

How often should torque specifications be checked and re-tightened?

It IS generally recommended to check and re-tighten torque specifications according to BMW's maintenance schedule or after any major suspension or engine work.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

Temperature Effects

Includes: High Heat, Cold Weather, Thermal Cycling

Temperature can significantly impact torque values and fastener behavior

Cold Weather

Effects:
  • Increased material brittleness
  • Higher torque required due to thread contraction
  • Reduced thread lubricant effectiveness
Recommendations:
  • Allow components to warm to room temperature when possible
  • Consider using winter-grade thread lubricants
  • Check torque values more frequently during winter months

Hot Weather

Effects:
  • Thermal expansion of components
  • Decreased friction in threads
  • Accelerated lubricant breakdown
Recommendations:
  • Check torque when components are at normal operating temperature
  • Use temperature-resistant thread lockers
  • Consider re-torquing after heat cycles

Humidity and Corrosion

Covers: Rust Prevention, Salt Exposure, Moisture Control

Moisture and corrosion can affect fastener integrity and torque values

High Humidity

Effects:
  • Accelerated corrosion formation
  • Reduced friction coefficient
  • Potential thread seizing
Prevention:
  • Use corrosion-resistant fasteners
  • Apply appropriate anti-seize compounds
  • Maintain proper protective coatings

Salt Exposure

Effects:
  • Rapid corrosion development
  • Thread damage
  • Seized fasteners
Prevention:
  • Regular underbody washing
  • Use of sacrificial anodes where appropriate
  • Application of protective coatings

Seasonal Maintenance

Spring, Summer, Fall, and Winter maintenance schedules

Spring

  • Inspect for winter damage
  • Clean and protect exposed fasteners
  • Check torque on critical components

Summer

  • Monitor heat-affected components
  • Check expansion-related loosening
  • Inspect cooling system mounts

Fall

  • Prepare for winter conditions
  • Apply corrosion protection
  • Verify all fasteners are properly torqued

Winter

  • More frequent inspection of critical fasteners
  • Check for salt damage
  • Monitor suspension component torque

Related Resources

Tools, service procedures, and technical bulletins

Recommended Tools

Digital Torque Wrench (10-100 Nm)

Ensures proper torque on delicate fasteners like cylinder heads, brake rotors, and suspension components.

  • Digital display for precise readings
  • Range suitable for most applications on the x4
  • Audible alarm when target torque IS reached
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Recommended Engine Bolt Torque Specifications

Guidelines for tightening head bolts, camshaft bolts, and oil pan bolts.

  • Clean all bolt threads and mating surfaces.
  • Apply a suitable thread locker or anti-seize compound.
  • Tighten bolts to the following specifications:
  • - Cylinder head bolts: 10 Nm (7 ft-lb) initial torque, then 25 Nm (18 ft-lb) + 90 degrees
  • - Camshaft bolts: 10 Nm (7 ft-lb) initial torque, then 20 Nm (15 ft-lb) + 90 degrees
  • - Oil pan bolts: 10 Nm (7 ft-lb)
View full procedure

Suspension Bolt Torque Specifications

Guidelines for tightening control arm bolts, sway bar links, and strut bolts.

  • Clean all bolt threads and mating surfaces.
  • Apply a suitable thread locker or anti-seize compound.
  • Tighten bolts to the following specifications:
  • - Control arm bolts: 120 Nm (89 ft-lb)
  • - Sway bar links: 60 Nm (44 ft-lb)
  • - Strut bolts: 90 Nm (66 ft-lb)
View full procedure

Brake System Bolt Torque Specifications

Guidelines for tightening brake caliper bolts, rotor bolts, and bleed screws.

  • Clean all bolt threads and mating surfaces.
  • Apply a suitable thread locker or anti-seize compound.
  • Tighten bolts to the following specifications:
  • - Brake caliper bolts: 110 Nm (81 ft-lb)
  • - Rotor bolts: 80 Nm (59 ft-lb)
  • - Bleed screws: 10 Nm (7 ft-lb)
View full procedure
Technical Service Bulletins

TSB: Incorrect Engine Oil Filter Torque

2015-03-01

Incorrect engine oil filter torque values were specified in the service manual. This TSB provides revised torque values.

2014-2015 x4

Resolution: Tighten the engine oil filter to the following specification: 25 Nm (18 ft-lb)

TSB: Suspension Noise During Cornering

2016-06-15

Some x4 models may exhibit a noise from the front suspension during cornering. This TSB provides a revised procedure for tightening the control arm bolts.

2016-2018 x4

Resolution: Tighten the control arm bolts to the following specifications: 120 Nm (89 ft-lb) + 90 degrees

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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