Audi Audi Q7 2015-present Suspension Bolt Torque Specifications & Fastener Values
Audi Audi Q7 2015-present

Audi Audi Q7 2015-present Suspension Bolt Torque Specifications

Detailed torque specifications for all suspension bolts on the 2015 to present Audi Q7 (4M 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 Suspension

Torque specifications for various components of the front suspension system including control arms, struts, sway bar, and brake components.

1

Upper Control Arm to Frame (Inner Bolts)

M12 x 1.5
Important Notes
These bolts secure the upper control arms to the vehicle's frame. Ensure proper torque to maintain suspension geometry and prevent excessive movement. Value is estimated based on similar vehicle data.
2

Upper Control Arm to Steering Knuckle (Pinch Bolt)

M10 x 1.25
Important Notes
Secures the upper control arm ball joint to the steering knuckle. The angle tightening method ensures proper clamping. Value is estimated based on similar vehicle data.
3

Lower Control Arm to Frame (Inner Bolts)

M14 x 1.5
Important Notes
Attaches the lower control arm to the frame. Critical for stability and wheel alignment. Value is estimated based on similar vehicle data.
4

Lower Control Arm to Steering Knuckle (Ball Joint Bolt)

M12 x 1.5
Torque Value
52 ft-lbs (70 N·m)
Important Notes
Secures the lower control arm ball joint to the steering knuckle. Value is estimated based on similar vehicle data.
5

Shock Absorber (Strut) Upper Mount to Body

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Attaches the top of the strut to the body. Secures the shock absorber. Value is estimated based on similar vehicle data.
6

Shock Absorber (Strut) Lower Bolt to Steering Knuckle

M14 x 1.5
Important Notes
Secures the bottom of the strut to the steering knuckle. Subject to significant force. Value is estimated based on similar vehicle data.
7

Anti-Roll Bar (Sway Bar) Link to Strut

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Connects the sway bar link to the strut. Value is estimated based on similar vehicle data.
8

Anti-Roll Bar (Sway Bar) Link to Sway Bar

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Connects the sway bar link to the sway bar. Value is estimated based on similar vehicle data.
9

Anti-Roll Bar (Sway Bar) to Frame Mount

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the sway bar to the frame. Value is estimated based on similar vehicle data.
10

Wheel Speed Sensor Bolt

M6 x 1
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the wheel speed sensor to the hub or steering knuckle. Low torque fastener, use care to not damage sensor. Value is estimated based on industry standard sensor bolts.
Page 1 of 2

Rear Suspension

Torque specifications for various components of the rear suspension system including control arms, struts, sway bar, and brake components.

1

Upper Control Arm to Frame (Inner Bolts)

M12 x 1.5
Important Notes
These bolts secure the upper control arms to the vehicle's frame. Ensure proper torque to maintain suspension geometry and prevent excessive movement. Value is estimated based on similar vehicle data.
2

Upper Control Arm to Wheel Carrier (Pinch Bolt)

M10 x 1.25
Important Notes
Secures the upper control arm to the wheel carrier. Critical for alignment and stability. Value is estimated based on similar vehicle data.
3

Lower Control Arm to Frame (Inner Bolts)

M14 x 1.5
Important Notes
Attaches the lower control arm to the frame. Important for handling and stability. Value is estimated based on similar vehicle data.
4

Lower Control Arm to Wheel Carrier (Ball Joint Bolt)

M12 x 1.5
Torque Value
52 ft-lbs (70 N·m)
Important Notes
Secures the lower control arm ball joint to the wheel carrier. Value is estimated based on similar vehicle data.
5

Shock Absorber (Strut) Upper Mount to Body

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Attaches the top of the rear strut to the body. Secures the shock absorber. Value is estimated based on similar vehicle data.
6

Shock Absorber (Strut) Lower Bolt to Wheel Carrier

M14 x 1.5
Important Notes
Secures the bottom of the strut to the wheel carrier. Value is estimated based on similar vehicle data.
7

Toe Control Arm to Frame

M12 x 1.5
Important Notes
Secures the toe control arm to the frame. Proper torque affects rear wheel alignment (toe). Value is estimated based on similar vehicle data.
8

Toe Control Arm to Wheel Carrier

M12 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Secures the toe control arm to the wheel carrier, affecting rear toe alignment. Value is estimated based on similar vehicle data.
9

Anti-Roll Bar (Sway Bar) Link to Strut

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Connects the sway bar link to the rear strut. Value is estimated based on similar vehicle data.
10

Anti-Roll Bar (Sway Bar) Link to Sway Bar

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Connects the sway bar link to the sway bar. Value is estimated based on similar vehicle data.
Page 1 of 2

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 using the correct torque specification important for suspension bolts?

Using the correct torque specification ensures that the suspension components are properly secured and function as designed. Under-torquing can lead to bolts loosening, causing noises, instability, and potentially dangerous component failure. Over-torquing can stretch or damage bolts, threads, and surrounding materials, leading to premature failure or stripping of threads. This is critical for maintaining proper wheel alignment, handling, and vehicle safety. Imagine driving over a pothole - properly torqued bolts are critical in absorbing that impact without compromising the suspension.

Q2

Do I need to replace bolts after removing them from the suspension?

While not always required for all bolts, many suspension bolts, especially those that are torque-to-yield (TTY) or stretch bolts, should be replaced every time they are removed. These bolts are designed to stretch slightly during tightening, providing the correct clamping force. Reusing them can lead to improper clamping and potentially dangerous failure. Always consult your vehicle's repair manual for specific recommendations. For example, control arm bolts, often TTY, must be replaced.

Q3

What is torque-to-yield (TTY) and how does it affect the installation process?

Torque-to-yield bolts are designed to stretch when torqued. They are tightened first to a specific torque and then to an additional angle. Because they stretch, they must be replaced when removed. Using a traditional torque wrench isn't enough, you often need an angle measuring tool for the additional degree specification. This ensures the correct clamping force and reduces the chances of the bolt working itself loose. If a bolt looks different than others (longer, thinner, etc.) it likely is TTY and needs to be replaced during a repair.

Q4

Should I use thread locker on suspension bolts?

Using thread locker (like Loctite) on suspension bolts is generally not recommended unless explicitly specified by the manufacturer in the repair manual. Most suspension bolts are designed with locking features or utilize self-locking nuts. Applying thread locker where not required may make future removal difficult and can also lead to incorrect torque readings. Consult your vehicle's service information before using thread locker on any suspension component.

Q5

What tools do I need to properly torque suspension bolts?

You'll need a calibrated torque wrench that covers the torque range of the bolts you are working with. It's also useful to have a set of sockets, extensions, and potentially a torque angle gauge if you are working with torque-to-yield bolts. It's highly recommended to avoid cheap tools. The precision of a quality torque wrench is essential to correctly fastening suspension components and ensuring safety. A 'click' style torque wrench is standard, and it is also essential that it is properly calibrated.

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" Drive)

A calibrated torque wrench is essential for accurately tightening suspension bolts to their specified torque values.

  • Accurate torque application
  • Click-type mechanism for precise setting
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench is useful for lower torque applications.

  • Smaller profile for tight areas
  • Accurate torque settings for smaller bolts
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is needed to fit the various suspension bolts on the Audi Q7.

  • Various sizes for different bolts
  • Durable construction
Learn more

Socket Extensions

Extensions allow access to bolts in recessed locations.

  • Various lengths
  • Solid connection with sockets
Learn more

Universal Joint Socket Adapter

Allows access to bolts at an angle.

  • Flexible joint for hard to reach areas
  • Solid connection
Learn more
Service Procedures

Front Upper Control Arm Bolt Torque Procedure

Procedure for properly torquing the bolts securing the front upper control arms to the frame and hub carrier.

  • Loosen, but do not remove, the upper control arm bolts.
  • With the vehicle at ride height, tighten the front upper control arm bolts to the manufacturer's torque specifications.
  • Double check all bolts and ensure the torque is as specified.
View full procedure

Front Lower Control Arm Bolt Torque Procedure

Procedure for properly torquing the bolts securing the front lower control arms to the frame and hub carrier.

  • Loosen, but do not remove, the lower control arm bolts.
  • With the vehicle at ride height, tighten the front lower control arm bolts to the manufacturer's torque specifications.
  • Double check all bolts and ensure the torque is as specified.
View full procedure

Rear Upper Control Arm Bolt Torque Procedure

Procedure for properly torquing the bolts securing the rear upper control arms to the frame and hub carrier.

  • Loosen, but do not remove, the rear upper control arm bolts.
  • With the vehicle at ride height, tighten the rear upper control arm bolts to the manufacturer's torque specifications.
  • Double check all bolts and ensure the torque is as specified.
View full procedure

Rear Lower Control Arm Bolt Torque Procedure

Procedure for properly torquing the bolts securing the rear lower control arms to the frame and hub carrier.

  • Loosen, but do not remove, the rear lower control arm bolts.
  • With the vehicle at ride height, tighten the rear lower control arm bolts to the manufacturer's torque specifications.
  • Double check all bolts and ensure the torque is as specified.
View full procedure

Front Strut to Steering Knuckle Bolt Torque Procedure

Procedure for torquing the bolts connecting the front strut to the steering knuckle.

  • Loosen, but do not remove the strut to steering knuckle bolts.
  • Tighten the bolts to the manufacturer specified torque.
  • Double check the torque after tightening.
View full procedure

Rear Shock Absorber Mounting Bolt Torque Procedure

Procedure for torquing the bolts securing the rear shock absorber.

  • Loosen, but do not remove, the rear shock absorber bolts.
  • With the vehicle at ride height, tighten the rear shock absorber bolts to the manufacturer specified torque.
  • Double check all bolts and ensure the torque is as specified.
View full procedure
Technical Service Bulletins

Suspension Noise After Control Arm Replacement

2018-03-15

Some 2016-2018 Audi Q7 vehicles may experience suspension noise after a control arm replacement due to improper torque or reusing stretch bolts.

2016-2018 Audi Q7

Resolution: Ensure all control arm bolts are replaced with new, one-time use bolts and torqued to the precise factory specifications while the vehicle is at ride height.

Front End Clunking Noise

2020-07-22

Some 2018-2020 Audi Q7 vehicles have reported a front-end clunking noise when driving over bumps which can be caused by incorrectly torqued sway bar links or control arms.

2018-2020 Audi Q7

Resolution: Inspect and re-torque the front sway bar link bolts and control arm bolts per factory specifications. Check condition of sway bar bushings.

Premature Bushing Wear

2022-11-01

Premature bushing wear may result from improper installation of suspension components due to improper torquing of bolts.

2015-2022 Audi Q7

Resolution: Replace worn bushings and ensure all suspension bolts are torqued correctly, using a new bolt where one-time use bolts are required. Ensure vehicle is at ride height when torquing suspension.

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