Audi Audi Q3 2018-present Suspension Bolt Torque Specifications & Fastener Values
Audi Audi Q3 2018-present

Audi Audi Q3 2018-present Suspension Bolt Torque Specifications

Detailed torque specifications for suspension bolts on the 2018-Present Audi Q3, including front and rear suspension components. Ensure proper installation and vehicle safety by adhering to these torque values.

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 bolts related to the front suspension system, including control arms, struts, and sway bar links. These values are critical for maintaining proper suspension geometry, steering integrity, and vehicle stability. Always use a calibrated torque wrench and follow the specified torque sequence to prevent component failure or safety issues. Replace any torque-to-yield bolts upon removal.

1

Upper Control Arm to Strut Bolts

M12 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on similar Audi/VW models using M12 bolts in this application. Correct torque maintains suspension geometry and prevents play.
2

Lower Control Arm to Subframe Bolts

M14 x 1.5
Important Notes
Estimated value based on similar Audi/VW models using M14 bolts in this application. These are torque-to-yield bolts and must be replaced after removal. Final angle is critical for proper clamping force.
3

Lower Control Arm Ball Joint to Steering Knuckle Bolt

M12 x 1.5
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Estimated value based on similar Audi/VW models using M12 bolts in this application. Correct torque is critical for steering integrity.
4

Sway Bar Link to Strut Bolt

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on common M10 applications in sway bar links.
5

Sway Bar Link to Sway Bar Nut

M10 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on common M8/M10 nut applications in sway bar links.
6

Strut Mount to Body Bolts

M10 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on common M8/M10 applications in strut mounts.
7

Strut to Steering Knuckle Bolts

M14 x 1.5
Important Notes
Estimated value based on similar Audi/VW models using M14 bolts in this application. These are torque-to-yield bolts and must be replaced after removal. Final angle is critical for proper clamping force.
8

Brake Caliper Bracket Bolts

M14 x 1.5
Torque Value
140 ft-lbs (190 N·m)
Important Notes
Critical for brake system safety. Ensure proper torque to maintain brake performance and safety.

Rear Suspension

Torque specifications for bolts associated with the rear suspension system, including control arms, links, and shock absorbers. Proper torque is crucial for maintaining alignment, stability, and handling. Torque-to-yield bolts must be replaced after removal. Always use a calibrated torque wrench and verify torque sequences.

1

Upper Control Arm to Body Bolts

M12 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on similar Audi/VW models using M12 bolts in this application. Critical for rear suspension geometry.
2

Upper Control Arm to Wheel Carrier (Upright) Bolt

M12 x 1.5
Important Notes
Estimated value based on similar Audi/VW models using M12/M14 bolts in this application. This is a torque-to-yield bolt and must be replaced after removal. Final angle is critical for proper clamping force.
3

Lower Control Arm to Body Bolts

M14 x 1.5
Important Notes
Estimated value based on similar Audi/VW models using M14 bolts in this application. These are torque-to-yield bolts and must be replaced after removal. Final angle is critical for proper clamping force.
4

Lower Control Arm to Wheel Carrier (Upright) Bolt

M14 x 1.5
Important Notes
Estimated value based on similar Audi/VW models using M14 bolts in this application. This is a torque-to-yield bolt and must be replaced after removal. Final angle is critical for proper clamping force.
5

Toe Link to Body Bolt

M12 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on common M12 applications in toe links. Correct torque is vital for proper alignment and tire wear.
6

Toe Link to Wheel Carrier (Upright) Bolt

M12 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on common M12 applications in toe links. Correct torque is vital for proper alignment and tire wear.
7

Rear Sway Bar Link to Control Arm Bolt

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on common M10 applications in sway bar links.
8

Rear Sway Bar Link to Sway Bar Nut

M10 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on common M8/M10 nut applications in sway bar links.
9

Shock Absorber Lower Mounting Bolt

M12 x 1.5
Torque Value
52 ft-lbs (70 N·m)
Important Notes
Estimated value based on similar Audi/VW models using M12 bolts in this application. Critical for suspension damping.
10

Shock Absorber Upper Mounting Bolt/Nut

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on common M10 applications in shock absorber mounts.
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 specifications important for suspension bolts?

Using the correct torque specification is crucial for several reasons. Under-torquing can lead to bolts loosening over time, causing clunking noises, suspension instability, and potentially catastrophic failure. Over-torquing can stretch or damage the bolts and the mating components, leading to bolt failure or damage that may compromise suspension integrity. Both scenarios can affect vehicle handling and safety.

Q2

What tools are needed to properly torque suspension bolts?

You will need a calibrated torque wrench, sockets of the correct size for each bolt, and potentially extension bars or adapters to reach tight spots. It’s best to use a torque wrench that reads in Newton-meters (Nm) as Audi specifications are generally listed in Nm, also be sure the tool has been calibrated in the last year.

Q3

Do I need to replace the bolts after removing them?

While not always necessary, it's generally good practice to replace 'stretch' or 'torque to yield' bolts whenever they are removed. These bolts are designed to deform slightly when torqued, ensuring a secure hold. Reusing them might lead to reduced clamping force and potentially cause issues. Consult your repair manual to verify if bolts should be replaced.

Q4

Should I apply any type of lubricant to the threads?

Unless otherwise specified by Audi in their service manual, no lubricant should be used on threads. Applying lubricants may alter torque specifications. These torque settings are given as dry torque values.

Q5

Are all the torque specs on the Q3 the same for different chassis types?

While most of the torque specs will be the same between an Audi Q3, an RSQ3, and other trim packages, it is extremely important to verify in your service manual that you are following the correct torque specification for *your* vehicle.

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 bolts to their specified torque values. A 1/2 inch drive is recommended for most suspension components on the Audi Q3.

  • Click-type or digital
  • Range of at least 20-200 Nm
  • Accurate to within +/- 3%
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench is necessary for lower torque applications, such as sway bar links.

  • Click-type or digital
  • Range of at least 10-100 Nm
  • Accurate to within +/- 3%
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is needed to fit various bolt and nut sizes on the suspension system.

  • Variety of sizes from 10mm to 24mm
  • 6-point sockets preferred for better grip
  • Deep sockets for reaching recessed bolts
Learn more

Extension Bars

Extension bars help reach bolts in tight spaces and allow proper wrench clearance.

  • Various lengths available
  • Strong, durable construction
Learn more

Universal Joint

A universal joint allows the torque wrench to be used at an angle.

  • Allows for flexible access
  • Durable construction
Learn more

Jack Stands

Essential for safely supporting the vehicle while working on the suspension.

  • Rated for the vehicle's weight
  • Adjustable height
Learn more
Service Procedures

Front Strut Assembly Removal and Installation

Detailed procedure for removing and installing the front strut assembly, including proper torque specs for all associated bolts.

  • Loosen lug nuts on the wheel, raise the vehicle and support on jack stands.
  • Remove the wheel.
  • Disconnect any sensor or brake lines attached to the strut.
  • Loosen and remove the sway bar link connection to the strut.
  • Loosen the pinch bolt securing the strut to the steering knuckle.
  • Remove the three strut tower bolts.
  • Carefully remove the strut assembly.
  • Install the new or refurbished strut assembly, ensuring proper alignment.
  • Hand tighten the three strut tower bolts.
  • Install the pinch bolt.
  • Connect sway bar link.
  • Torque all bolts to specification. Check wheel alignment.
  • Reinstall the wheel and torque lug nuts to specification.
View full procedure

Rear Shock Absorber Replacement

Steps to remove and install the rear shock absorbers, including associated torque specifications.

  • Loosen lug nuts on the wheel, raise the vehicle and support on jack stands.
  • Remove the wheel.
  • Remove any interior trim necessary to access the top of the shock absorber.
  • Loosen the top shock mount nut.
  • Remove the lower shock bolt.
  • Remove the shock absorber.
  • Install the new shock absorber.
  • Install the lower bolt, but do not fully tighten.
  • Install and hand tighten the top shock mount nut.
  • Torque all bolts to specification.
  • Reinstall the wheel and torque lug nuts to specification.
View full procedure

Sway Bar Link Replacement

Procedure for replacing sway bar links, including proper torque application.

  • Loosen lug nuts on the wheel, raise the vehicle and support on jack stands.
  • Remove the wheel.
  • Loosen the nut or bolt securing the sway bar link to the sway bar.
  • Loosen the nut or bolt securing the sway bar link to the strut or control arm.
  • Remove the sway bar link.
  • Install the new link and hand tighten the fasteners.
  • Torque all fasteners to specification.
  • Reinstall the wheel and torque lug nuts to specification.
View full procedure
Technical Service Bulletins

Suspension Noise on Rough Roads

2021-03-15

Some 2018-2020 Audi Q3 models may exhibit a clunking noise from the front suspension when driving over rough roads. This may be due to the front strut mount.

2018-2020

Resolution: Inspect and replace front strut mounts as needed. Re-torque all associated bolts to specification after replacement.

Rear Suspension Squeak

2022-08-01

A squeaking noise from the rear suspension of 2019-2021 Audi Q3 models can sometimes be attributed to dry bushings in the lower control arms. This may be made worse in colder conditions.

2019-2021

Resolution: Lubricate lower control arm bushings. If the issue persists, replace the bushings. Re-torque control arm bolts to specification.

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