BMW 335i 2005-2011 Suspension Bolt Torque Specifications & Fastener Values
BMW 335i 2005-2011

BMW 335i 2005-2011 Suspension Bolt Torque Specifications

Comprehensive guide to the suspension bolt torque specifications for the 2005-2011 BMW 335i (E90, E92, and E93 chassis). 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 Strut Assembly

Specifications for the front strut assembly, including the strut mount, shock absorber, and related components.

1

Strut/Shock Absorber Mounting Bolts (Lower)

M12 x 1.5
Torque Value
29 ft-lbs (39 N·m)
Important Notes
These bolts secure the lower strut assembly to the steering knuckle or lower control arm. Ensure proper alignment before tightening. Torque spec based on general M12 bolt size, verify with manufacturer specs.
2

Front Strut Top Nut

M14 x 1.5
Important Notes
This nut secures the top of the strut assembly to the strut tower. The 90-degree turn is critical for proper clamping force. Replace the nut if it has been previously used. Torque spec based on general M14 bolt size, verify with manufacturer specs.

Front Control Arms

Torque specifications for the front control arms and related hardware.

1

Control Arm Mounting Bolts

M14 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
These bolts secure the control arm to the chassis and the steering knuckle or hub carrier. Ensure correct alignment of the control arm before tightening. Torque spec based on general M14 bolt size, verify with manufacturer specs.
2

Ball Joint Nut

M12 x 1.25
Torque Value
52 ft-lbs (70 N·m)
Important Notes
This nut secures the ball joint to the control arm or steering knuckle. Check the ball joint for proper seating before tightening. Torque spec based on general M12 bolt size, verify with manufacturer specs.

Steering Components

Torque specifications for steering components which are integral to suspension function

1

Tie Rod End Nut

M12 x 1.5
Torque Value
44 ft-lbs (60 N·m)
Important Notes
This nut secures the tie rod end to the steering knuckle. Ensure proper alignment and seating before tightening. Torque spec based on general M12 bolt size, verify with manufacturer specs.

Front Sway Bar

Torque specs for the front sway bar, end links and mounting hardware.

1

Sway Bar Link Nut

M10 x 1.25
Torque Value
41 ft-lbs (55 N·m)
Important Notes
These nuts secure the sway bar links to the sway bar and strut or control arm. Ensure the links are not binding before tightening. Torque spec based on general M10 bolt size, verify with manufacturer specs.
2

Front Stabilizer/Sway Bar Bracket Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
These bolts secure the sway bar mounting brackets to the frame or subframe. Ensure the sway bar is properly aligned within the bushings before tightening. Torque spec based on general M8 bolt size, verify with manufacturer specs.

Rear Suspension

Torque specs for the rear shock absorbers, subframe, and related components.

1

Rear Shock Absorber Upper Mounting Bolt

M10 x 1.25
Torque Value
43 ft-lbs (58 N·m)
Important Notes
This bolt secures the top of the rear shock absorber to the chassis. Ensure proper shock alignment before tightening. Torque spec based on general M10 bolt size, verify with manufacturer specs.
2

Rear Shock Absorber Lower Mounting Bolt

M12 x 1.5
Torque Value
60 ft-lbs (81 N·m)
Important Notes
This bolt secures the bottom of the rear shock absorber to the control arm or hub carrier. Ensure proper shock alignment before tightening. Torque spec based on general M12 bolt size, verify with manufacturer specs.
3

Rear Subframe Mounting Bolts

M14 x 1.5
Important Notes
These large bolts secure the rear subframe to the chassis. The 90-degree turn is critical for proper clamping force. Replace the bolts if they have been previously used. Torque spec based on general M14 bolt size, verify with manufacturer specs.
4

Rear Stabilizer/Sway Bar Bracket Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
These bolts secure the rear sway bar mounting brackets to the frame or subframe. Ensure the sway bar is properly aligned within the bushings before tightening. Torque spec based on general M8 bolt size, verify with manufacturer specs.

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 are proper torque specifications important for suspension bolts?

Proper torque ensures the fasteners are tight enough to prevent loosening and component movement, but not so tight as to cause damage, stretching, or failure. Under-torqued bolts can lead to play in the suspension, causing noise, instability, and uneven tire wear, while over-torqued bolts can break or damage threads, which can also lead to component failure and expensive repairs.

Q2

Can I reuse torque-to-yield bolts?

No, torque-to-yield (TTY) bolts, often used in suspension components, are designed to stretch upon tightening and should NEVER be reused. They are designed to deform to a specific length at final torque spec and reusing them compromises their strength and clamping force, increasing the risk of component failure. Always replace TTY bolts with new ones when reassembling the suspension.

Q3

Do I need to use a torque wrench for suspension bolts?

Yes, absolutely. Using a torque wrench is crucial to achieve the correct torque on suspension fasteners. Relying on feel or impact tools can lead to under- or over-torqued bolts, which can have severe safety implications. A torque wrench ensures consistent and accurate tightening, which is necessary for suspension components that experience a lot of stress.

Q4

What happens if I overtighten a suspension bolt?

Overtightening a suspension bolt can lead to several issues, including: stripping the threads in the receiving component, which then requires repair or replacement. Additionally, it can stretch or break the bolt which leads to sudden component failure; and can damage or crush the bushings, prematurely wearing them and affecting the suspension's performance. Overtightening is equally as dangerous as undertightening.

Q5

Do I need to re-torque suspension bolts after driving?

While not always strictly required, it's a good practice to re-torque suspension bolts after a short initial driving period (approx. 50-100 miles) after work is performed. This is because settling may occur, and re-torquing ensures the bolts maintain the correct clamping force. It's especially critical after significant work has been performed or if suspension parts have been replaced.

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 capable of applying the required torque values for suspension components. 1/2 inch drive is recommended for higher torque fasteners.

  • Wide torque range (20-200 ft-lbs)
  • Click-type mechanism for accurate torque application
  • Durable construction
Learn more

Torque Wrench (3/8 inch drive)

A smaller torque wrench for lower torque fasteners, particularly in areas with limited space. Often used for smaller control arm bolts.

  • Torque range (5-80 ft-lbs)
  • Compact design
  • Precise torque application
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, including deep sockets for reaching recessed fasteners. Essential for tightening and loosening suspension bolts.

  • Variety of sizes (10mm-22mm)
  • 6-point design for secure grip
  • Durable construction
Learn more

Wrench Set (Metric)

A set of metric wrenches, including open end and box end wrenches for accessing areas where a socket might not fit.

  • Variety of sizes (10mm-22mm)
  • Durable construction
  • Different head styles
Learn more

Jack Stands

Heavy-duty jack stands to support the vehicle safely during suspension work.

  • Adjustable height
  • Locking mechanisms
  • High weight capacity
Learn more

Vehicle Jack

A suitable jack for lifting the BMW to access suspension components. Low-profile jacks are often helpful.

  • Adequate lifting capacity
  • Stable base
  • Smooth operation
Learn more
Service Procedures

Front Strut Removal and Installation

Procedure for safely removing and installing the front strut assembly, including torquing the main strut bolts and other related fasteners.

  • Loosen lug nuts on the wheel
  • Raise and support the vehicle on jack stands
  • Remove the wheel
  • Disconnect any sensor wires attached to the strut
  • Remove the brake caliper (without disconnecting brake line) and secure it to the side
  • Loosen but do not remove the sway bar end link nut
  • Support the control arm with a jack
  • Remove the two strut bolts at the bottom of the strut
  • Remove the three top strut mount nuts
  • Carefully remove the strut assembly
  • Install the new strut, ensuring proper alignment
  • Install the three top strut nuts - torque to spec
  • Install the two strut bolts at the bottom - torque to spec
  • Reattach the sway bar end link and torque to spec
  • Reattach the brake caliper and torque to spec
  • Reattach any sensor wires previously disconnected
  • Reinstall the wheel
  • Lower the vehicle and torque lug nuts to spec
View full procedure

Rear Shock Absorber Replacement

Detailed steps for safely replacing rear shocks, ensuring all related bolts are torqued correctly.

  • Loosen the lug nuts on the wheel
  • Raise and support the vehicle using jack stands
  • Remove the wheel
  • Support the control arm with a jack
  • Remove the top shock mount nut/bolts
  • Remove the bottom shock bolt
  • Remove the old shock absorber.
  • Install the new shock absorber, ensuring proper alignment
  • Install the bottom shock bolt - torque to spec
  • Install the top shock mount bolts/nut - torque to spec
  • Reinstall the wheel
  • Lower the vehicle and torque lug nuts to spec
View full procedure

Control Arm Replacement (Front)

Steps to replace a front control arm, including torque specifications for all relevant fasteners.

  • Loosen lug nuts on the wheel
  • Raise and support the vehicle on jack stands
  • Remove the wheel
  • Remove the sway bar end link nut from the control arm
  • Remove the ball joint nut from the control arm
  • Use a ball joint separator tool to separate the ball joint from the control arm
  • Remove the control arm bolt where it mounts to the frame
  • Remove the old control arm
  • Install the new control arm
  • Install the control arm bolt where it mounts to the frame - torque to spec
  • Install the ball joint to the control arm and secure with a new nut - torque to spec
  • Install the sway bar end link nut - torque to spec
  • Reinstall the wheel
  • Lower the vehicle and torque lug nuts to spec
  • Get a wheel alignment
View full procedure
Technical Service Bulletins

Squeaking Noise from Front Suspension

2008-05-15

Identifies a common issue of squeaking noises from the front suspension, often caused by worn sway bar bushings or end links. Also, it could be caused by worn control arms.

2005-2011

Resolution: Inspect and replace sway bar bushings, end links, and control arms if needed. Ensure all fasteners are torqued to specification after replacement. If the noise persists, further diagnosis may be required.

Rear Subframe Bolt Issue

2010-11-20

Details a potential issue with rear subframe bolts becoming loose over time, leading to handling problems and noise. This bulletin recommends checking the torque of these bolts regularly.

2005-2011

Resolution: Inspect the rear subframe bolts for looseness. Re-torque all subframe bolts to the correct specification, using new bolts is recommended.

Excessive Play in Front Strut Mounts

2009-02-28

Describes a problem with premature wear and excessive play in front strut mounts, which can lead to clunking noises and poor handling. Replacing the strut mounts and torquing the top strut nuts to spec can solve the problem.

2005-2011

Resolution: Replace the front strut mounts with updated parts. Ensure all fasteners are torqued to the factory specifications. Following the strut assembly procedure to make sure the mount sits correctly is crucial.

About the Author

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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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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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