BMW 650i 2012-2017 Suspension Bolt Torque Specifications & Fastener Values
BMW 650i 2012-2017

BMW 650i 2012-2017 Suspension Bolt Torque Specifications

Detailed torque specifications for all suspension bolts on the 2012-2017 BMW 650i (F12/F13 generation). Includes front and rear suspension components.

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

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

Front Struts

Torque specifications for components related to the front strut assembly, including mounting to the body and steering knuckle.

1

Strut/Shock Absorber Lower Mounting Bolts to Steering Knuckle

M14 x 1.5
Important Notes
Tighten bolts to specified torque, then turn an additional 90 degrees. Always replace these bolts when removed.
2

Strut/Shock Absorber Upper Mounting Nuts/Bolts to Body

M10 x 1.25
Important Notes
Tighten to initial torque, then an additional 90 degrees. Use new nuts/bolts. Always follow a cross tightening pattern.

Front Control Arms

Torque specifications for the front control arm mounting bolts and ball joints.

1

Front Control Arm Mounting Bolts (Chassis Side)

M14 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Ensure the suspension is at ride height when tightening to ensure proper preload of bushings.
2

Ball Joint Nut

M12 x 1.5
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Use a new nut if previously removed. Ensure the ball joint is properly seated before tightening.

Rear Suspension

Torque specs for the rear control arms and associated hardware.

1

Rear Upper Control Arm Mounting Bolt (Chassis Side)

M12 x 1.5
Important Notes
Tighten to specified torque, then turn an additional 90 degrees. Always use a new bolt.
2

Rear Lower Control Arm Mounting Bolt (Chassis Side)

M14 x 1.5
Important Notes
Tighten to specified torque, then turn an additional 90 degrees. Always use a new bolt.

Steering

Torque values for tie rod ends and associated components.

1

Tie Rod End Nut

M12 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Ensure the tie rod end is correctly seated in the knuckle.

Sway Bar

Torque specifications for sway bar links.

1

Sway Bar Link Nut

M10 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensure both the sway bar and control arm or strut mounting points are properly aligned before tightening.

Wheel Hub

Torque specifications for wheel hub/bearing retaining hardware.

1

Wheel Hub/Bearing Retaining Bolt/Nut

M20 x 1.5
Important Notes
Tighten to the specified torque and then rotate an additional 180 degrees. Always use a new bolt/nut.

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

Why is it important to use the correct torque specifications when tightening suspension bolts?

Using the correct torque specifications is crucial for safety and proper suspension function. Under-tightening can cause bolts to loosen, leading to instability, noise, and potential component failure. Over-tightening can damage bolts, threads, and surrounding components, potentially causing them to fail prematurely. Correct torque ensures the joint is properly clamped, maintaining the designed structural integrity and performance of the suspension.

Q2

Can I use a general torque specification chart instead of the BMW-specific ones for my 2012-2017 650i suspension?

No, it is strongly discouraged. General torque charts are often based on bolt size and material, but they do not account for the specific design, materials, and operational loads of your BMW's suspension. BMW engineers specify exact torque values for a reason, and deviating from them can compromise safety and performance. Always use the torque specs provided by BMW for your specific model and year.

Q3

Should I use new bolts when replacing suspension components on my 650i?

Yes, it is highly recommended to use new bolts, especially for critical suspension components. Many suspension bolts are designed to stretch slightly when torqued (torque-to-yield bolts), and reusing them can lead to failure. Additionally, older bolts may have corrosion or thread damage, making them unreliable. Always check your repair manual to confirm if new bolts are required.

Q4

How often should I check the torque on my suspension bolts after initially tightening them?

After replacing suspension components, it's recommended to re-check the torque on the bolts after a short break-in period, usually around 50-100 miles. This allows the components to settle and ensures the bolts haven't loosened. After this initial re-check, periodic inspections during routine maintenance are advised. If you notice any unusual noises or changes in vehicle handling, a thorough suspension inspection, including torque checks, should be performed immediately.

Q5

What tools are required for tightening suspension bolts to the correct torque?

You'll need a calibrated torque wrench that covers the range of torque values specified for your 650i's suspension. Also, a selection of sockets matching the bolt heads, and potentially extension bars and adapters to reach those fasteners. It is critical to use a quality wrench that can give you the precision needed. Ensure the torque wrench is calibrated regularly for accuracy. Always refer to your repair manual for specific tools needed.

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

Torque Wrench (1/2 inch drive)

A calibrated torque wrench is essential for achieving precise torque values on suspension components.

  • Click-type mechanism
  • Range of 20-200 Nm
Learn more

Torque Wrench (3/8 inch drive)

A smaller torque wrench for lower torque values on smaller fasteners.

  • Click-type mechanism
  • Range of 5-50 Nm
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets to fit various suspension fasteners.

  • Sizes ranging from 10mm to 24mm
  • Deep and shallow sockets
Learn more

Wrench Set (Metric)

A comprehensive set of metric wrenches to hold nuts when torquing bolts

  • Sizes ranging from 10mm to 24mm
  • Open-ended and box-ended wrenches
Learn more

Allen Wrench Set (Metric)

A set of metric allen wrenches for fasteners in hard to reach places or set screws

  • Various sizes for hex head screws
Learn more
Service Procedures

Front Strut Assembly Removal and Installation

Procedure for removing and installing the front strut assembly, including torque specifications.

  • Loosen wheel lug bolts.
  • Raise and support the vehicle securely.
  • Remove the wheel.
  • Disconnect any sensors attached to strut.
  • Remove the sway bar link from strut.
  • Support the steering knuckle to prevent it from dropping.
  • Remove the strut mounting bolts.
  • Carefully remove the strut assembly.
  • Install the new strut assembly.
  • Tighten all bolts to specified torque.
  • Reinstall the sway bar link and any sensors
  • Reinstall the wheel.
  • Lower the vehicle
  • Torque the wheel lug bolts.
View full procedure

Rear Shock Absorber Removal and Installation

Procedure for removing and installing the rear shock absorber, including torque specifications.

  • Loosen wheel lug bolts.
  • Raise and support the vehicle securely.
  • Remove the wheel.
  • Support the rear control arm.
  • Remove the lower shock bolt.
  • Remove the upper shock bolts.
  • Carefully remove the shock absorber.
  • Install the new shock absorber.
  • Tighten all bolts to specified torque.
  • Reinstall the wheel.
  • Lower the vehicle.
  • Torque the wheel lug bolts.
View full procedure

Control Arm Removal and Installation

Procedure for removing and installing a control arm, including torque specifications.

  • Loosen wheel lug bolts.
  • Raise and support the vehicle securely.
  • Remove the wheel.
  • Support the steering knuckle.
  • Disconnect any sway bar link connections.
  • Remove the bolts holding the control arm.
  • Carefully remove the control arm.
  • Install the new control arm.
  • Tighten all bolts to specified torque.
  • Reinstall the sway bar link and any sensors
  • Reinstall the wheel.
  • Lower the vehicle.
  • Torque the wheel lug bolts.
View full procedure
Technical Service Bulletins

Suspension Noise Related to Strut Mounts

2014-05-15

Some 2012-2014 650i vehicles may experience suspension noise due to loose or worn strut mounts. Inspection and torque of the mounting bolts are required.

2012-2014 BMW 650i

Resolution: Inspect strut mounts for wear, replace if needed. Ensure bolts are torqued to 59 Nm with new self locking nuts.

Rear Subframe Bolt Torque Check

2016-11-01

A potential issue with rear subframe bolt torque has been reported. This bulletin addresses the inspection and torque procedure for 2012-2017 650i models.

2012-2017 BMW 650i

Resolution: Inspect rear subframe bolts. Torque the bolts to 100 Nm + 90 degrees with new self locking bolts. Replace if visibly damaged.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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