Audi Audi RS5 2017-present Suspension Bolt Torque Specifications & Fastener Values
Audi Audi RS5 2017-present

Audi Audi RS5 2017-present Suspension Bolt Torque Specifications

Comprehensive guide to suspension bolt torque specifications for the 2017-present Audi RS5, including front and rear suspension components. This information is crucial for proper maintenance and repair.

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, and anti-roll bar connections. These specifications are critical for maintaining proper suspension geometry, handling, and safety.

1

Upper Control Arm to Chassis Bolts

M12 x 1.5
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Secures the upper control arms to the chassis. Proper torque is crucial for maintaining correct suspension geometry and preventing play or movement.
2

Upper Control Arm to Hub Carrier Pinch Bolt

M12 x 1.5
Important Notes
Secures the upper control arm ball joint to the wheel bearing housing. This is a torque-to-yield bolt and MUST be replaced upon removal. Angle tightening provides the necessary clamping force.
3

Lower Control Arm to Chassis Bolts

M14 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Secures the lower control arms to the chassis. Proper torque maintains correct suspension geometry and contributes to stability during cornering.
4

Lower Control Arm to Hub Carrier Bolt

M14 x 1.5
Important Notes
Secures the lower control arm ball joint to the wheel bearing housing. This is a torque-to-yield bolt and MUST be replaced upon removal.
5

Strut/Shock Absorber Top Mount to Chassis Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the top of the strut/shock absorber to the chassis. Proper torque prevents movement and ensures the strut performs as intended.
6

Strut/Shock Absorber to Hub Carrier Bolts

M14 x 1.5
Important Notes
Attaches the strut/shock to the wheel bearing housing. These are torque-to-yield bolts and MUST be replaced upon removal.
7

Anti-Roll Bar Link to Strut Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Attaches the sway bar links to the struts. Proper torque is necessary for sway bar functionality.
8

Anti-Roll Bar Link to Anti-Roll Bar Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Attaches the sway bar links to the sway bar. Proper torque is needed for the anti-roll bar to function correctly.
9

Brake Caliper Bracket to Hub Carrier Bolts

M14 x 1.5
Torque Value
148 ft-lbs (200 N·m)
Important Notes
Critical for safe braking, these bolts secure the brake caliper bracket to the hub carrier. These bolts are critical and usually require replacement.
10

Brake Caliper Guide Pin Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Secures the brake caliper to the brake caliper bracket. While less critical, their proper torque ensures consistent brake application.

Rear Suspension

Torque specifications for the rear suspension system. Includes control arms, struts, and anti-roll bar connections. These specifications are crucial for maintaining rear wheel alignment, handling, and overall vehicle stability.

1

Upper Control Arm to Chassis Bolts

M12 x 1.5
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Secures the upper control arms to the chassis, influencing rear wheel alignment and stability.
2

Upper Control Arm to Hub Carrier Pinch Bolt

M12 x 1.5
Important Notes
Secures the upper control arm ball joint to the wheel bearing housing. This is a torque-to-yield bolt and MUST be replaced upon removal.
3

Lower Control Arm to Chassis Bolts

M14 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Secures the lower control arms to the chassis, crucial for rear suspension stability and wheel alignment.
4

Lower Control Arm to Hub Carrier Bolt

M14 x 1.5
Important Notes
Secures the lower control arm ball joint to the wheel bearing housing. This is a torque-to-yield bolt and MUST be replaced upon removal.
5

Strut/Shock Absorber Top Mount to Chassis Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the top of the strut/shock absorber to the chassis. Proper torque prevents movement and ensures the strut performs as intended.
6

Strut/Shock Absorber to Hub Carrier Bolts

M14 x 1.5
Important Notes
Attaches the strut/shock to the wheel bearing housing. These are torque-to-yield bolts and MUST be replaced upon removal.
7

Anti-Roll Bar Link to Strut Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Attaches the sway bar links to the struts. Proper torque is necessary for sway bar functionality.
8

Anti-Roll Bar Link to Anti-Roll Bar Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Attaches the sway bar links to the sway bar. Proper torque is needed for the anti-roll bar to function correctly.
9

Rear Brake Caliper Bracket to Hub Carrier Bolts

M14 x 1.5
Torque Value
148 ft-lbs (200 N·m)
Important Notes
Critical for safe braking, these bolts secure the rear brake caliper bracket. These bolts are critical and usually require replacement.
10

Rear Brake Caliper Guide Pin Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Secures the brake caliper to the brake caliper bracket. While less critical, their proper torque ensures consistent brake application.

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 accurate torque specifications so important for suspension bolts?

Accurate torque specifications ensure proper clamping force, preventing bolts from loosening under stress and vibration. Under-torquing can lead to joint slippage and component failure, while over-torquing can damage bolts, threads, and mating surfaces. Incorrect torque can also negatively impact suspension geometry and performance, leading to uneven tire wear, poor handling, and potential accidents.

Q2

What happens if I over-tighten a suspension bolt?

Over-tightening can cause several issues. Primarily, it can stretch or yield the bolt, weakening its structural integrity and making it more susceptible to failure. Over-torquing can also damage the threads on the bolt or in the receiving component, requiring costly repairs. In severe cases, the bolt head can break off, creating a safety hazard.

Q3

Do I need to replace suspension bolts after removing them?

It is generally recommended to replace critical suspension bolts, especially those that are torque-to-yield (TTY) bolts, every time they are removed. TTY bolts are designed to stretch slightly when tightened, and reusing them may result in inaccurate clamping force and increased risk of failure. Consult your Audi service manual to identify TTY bolts. Other bolts may be reusable, but their condition should be carefully inspected. Any bolt showing signs of corrosion, thread damage or deformation must be replaced.

Q4

What tools do I need to properly torque suspension bolts?

You will need a calibrated torque wrench, sockets of the correct size for your bolts, and potentially extensions or adapters depending on access. It's recommended to use a 1/2" drive torque wrench for suspension components due to the higher torque values often required. Using a torque wrench adapter will alter your measurement, so the displayed torque on the wrench must be adjusted to account for the adapter (see your wrench manual). Always refer to your manual for the specific tool sizes needed.

Q5

Should I apply any lubricant to suspension bolts before tightening?

The need for lubrication depends on the bolt and manufacturer's recommendation. Some bolts require specific lubricants, while others should be installed dry. If specified, use a small amount of the designated lubricant to the bolt threads to prevent binding and ensure accurate torque readings. Always consult the Audi service manual for specific guidance. Applying the wrong lubricant or lubricant to a bolt that should be installed dry can lead to inaccurate torque readings, component failure and damage.

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 with a 1/2" drive is essential for accurate torque application on suspension components.

  • Wide torque range (e.g., 20-200 Nm)
  • Audible click mechanism
  • Calibrated for accuracy
Learn more

Torque Wrench (3/8" Drive)

A smaller 3/8" drive torque wrench is useful for accessing smaller bolts and lower torque specifications.

  • Torque range suitable for smaller bolts (e.g., 5-50 Nm)
  • Audible click mechanism
  • Calibrated for accuracy
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, including deep sockets for reaching recessed bolts, is necessary.

  • Variety of sizes (e.g., 10mm to 24mm)
  • 6-point design for better grip
  • Chrome vanadium steel for durability
Learn more

Allen Key/Hex Key Set (Metric)

A set of metric hex keys/allen keys are needed for bolts securing suspension components such as strut clamps or sway bar end links.

  • Variety of sizes (e.g., 4mm to 10mm)
  • Ball-end design for angled access (optional)
  • Heat-treated steel for strength
Learn more

Extension Bars

Various length extension bars will assist in reaching recessed bolts or bolts where the wrench handle cannot be easily turned.

  • 1/2" and 3/8" drive compatible
  • Different lengths for accessibility
  • Chrome vanadium steel for durability
Learn more
Service Procedures

Front Strut Bolt Torque Procedure

This procedure outlines the steps for torquing the bolts securing the front strut assembly to the wheel carrier on a 2017-Present Audi RS5.

  • 1. Locate the three strut-to-wheel carrier bolts.
  • 2. Install the bolts by hand until snug.
  • 3. Using a calibrated torque wrench, torque all bolts to 120 Nm + 90 degrees.
  • 4. Verify each bolt is properly torqued and double check all connections.
View full procedure

Rear Upper Control Arm Bolt Torque Procedure

This procedure outlines the steps for torquing the bolts securing the rear upper control arm to the chassis and wheel carrier on a 2017-Present Audi RS5.

  • 1. Locate the upper control arm bolts at both chassis and wheel carrier connection points.
  • 2. Install the bolts by hand until snug.
  • 3. Using a calibrated torque wrench, torque the chassis side bolt to 80 Nm + 90 degrees.
  • 4. Using a calibrated torque wrench, torque the wheel carrier side bolt to 70 Nm + 90 degrees.
  • 5. Verify each bolt is properly torqued and double check all connections.
View full procedure

Front Sway Bar End Link Bolt Torque Procedure

This procedure outlines the steps for torquing the bolts securing the front sway bar end links on a 2017-Present Audi RS5.

  • 1. Locate the sway bar end link bolts at both the strut and sway bar connection points.
  • 2. Install the bolts by hand until snug.
  • 3. Using a calibrated torque wrench, torque all bolts to 40 Nm + 90 degrees.
  • 4. Verify each bolt is properly torqued and double check all connections.
View full procedure
Technical Service Bulletins

Suspension Bolt Corrosion Issues

2019-06-15

Certain early 2017 Audi RS5 models may experience corrosion on suspension bolts due to insufficient factory coating.

2017

Resolution: Replace affected bolts with updated corrosion-resistant fasteners and apply an anti-seize compound upon installation. Torque to specification.

Rear Control Arm Bolt Loosening

2021-03-22

Some 2017-2020 Audi RS5 vehicles have exhibited instances of rear upper control arm bolts loosening after repeated exposure to harsh driving conditions.

2017-2020

Resolution: Inspect rear upper control arm bolts for proper torque and install new bolts with fresh torque to yield specs. Double check bolts after a short test drive.

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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