Subaru Subaru Impreza 2007-2011 Suspension Bolt Torque Specifications & Fastener Values
Subaru Subaru Impreza 2007-2011

Subaru Subaru Impreza 2007-2011 Suspension Bolt Torque Specifications

Detailed torque specifications for suspension bolts on the 2007-2011 Subaru Impreza, including 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

Strut Shock Absorber

This subsystem includes bolts that secure the strut or shock absorber to the vehicle's chassis and suspension components. Proper torque ensures alignment, ride quality, and suspension functionality.

1

Strut/Shock Absorber Mounting Bolts

M12 x 1.5
Torque Value
72.5 ft-lbs (98.5 N·m)
Important Notes
Torque value is an average of the provided range (66-79 ft-lbs / 90-107 Nm).
2

Strut Tower Mounting Bolts

M10 x 1.25
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Torque value is an average of the provided range (40-50 ft-lbs / 54-68 Nm).
3

Lower Strut Mounting Bolts

M12 x 1.5
Torque Value
65 ft-lbs (88 N·m)
Important Notes
Torque value is an average of the provided range (60-70 ft-lbs / 81-95 Nm).

Control Arm Ball Joint

This subsystem includes bolts and nuts that connect the control arms and ball joints to the chassis and steering knuckle. Proper torque ensures suspension geometry, alignment, and handling.

1

Control Arm Bolts

M14 x 1.5
Torque Value
89 ft-lbs (121 N·m)
Important Notes
Torque value is an average of the provided range (83-95 ft-lbs / 113-129 Nm).
2

Ball Joint Nut

M12 x 1.25
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Torque value is an average of the provided range (43-51 ft-lbs / 59-69 Nm).

Steering System

This subsystem includes bolts and nuts that secure the steering rack, tie rod ends, and related components. Proper torque ensures precise steering control and alignment.

1

Tie Rod End Nut

M10 x 1.25
Torque Value
36.5 ft-lbs (49.5 N·m)
Important Notes
Torque value is an average of the provided range (33-40 ft-lbs / 45-54 Nm).
2

Steering Gear/Rack Bolts

M12 x 1.5
Torque Value
65.5 ft-lbs (89 N·m)
Important Notes
Torque value is an average of the provided range (59-72 ft-lbs / 80-98 Nm).

Sway Bar

This subsystem includes nuts that secure the sway bar links to the sway bar and suspension components. Proper torque ensures stability during cornering and prevents excessive body roll.

1

Sway Bar Link Nut

M10 x 1.25
Torque Value
30 ft-lbs (40.5 N·m)
Important Notes
Torque value is an average of the provided range (27-33 ft-lbs / 36-45 Nm).

Wheel Hub

This subsystem includes lug nuts that secure the wheels to the hub. Proper torque ensures the wheels are safely attached and prevents loosening or vibration.

1

Wheel Lug Nuts

M12 x 1.5
Torque Value
90 ft-lbs (122 N·m)
Important Notes
Torque value is an average of the provided range (80-100 ft-lbs / 108-136 Nm). Always use a star pattern for tightening.

Rear Suspension

This subsystem includes bolts that secure the rear trailing arms and lateral links to the chassis and suspension components. Proper torque ensures stability and alignment of the rear suspension.

1

Rear Trailing Arm Bolts

M14 x 1.5
Torque Value
77.5 ft-lbs (105 N·m)
Important Notes
Torque value is an average of the provided range (70-85 ft-lbs / 95-115 Nm).
2

Rear Lateral Link Bolts

M12 x 1.5
Torque Value
67.5 ft-lbs (91.5 N·m)
Important Notes
Torque value is an average of the provided range (60-75 ft-lbs / 81-102 Nm).

Subframe

This subsystem includes bolts that secure the subframe to the chassis. Proper torque ensures structural integrity and alignment of the suspension system.

1

Subframe Mounting Bolts

M14 x 1.5
Torque Value
80 ft-lbs (108.5 N·m)
Important Notes
Torque value is an average of the provided range (70-90 ft-lbs / 95-122 Nm). Always use a crisscross pattern for tightening.

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

What is the torque specification for the front strut-to-knuckle bolts on a 2007-2011 Subaru Impreza?

The front strut-to-knuckle bolts should be torqued to 129-144 Nm (95-106 ft-lbs). Ensure the vehicle is on a flat surface and the suspension is at normal ride height before tightening to avoid preloading the bushings.

Q2

How often should I check the torque on suspension bolts?

It is recommended to check the torque on suspension bolts every 12,000 miles or during routine maintenance. Additionally, recheck after any suspension work or if you notice unusual noises or handling issues.

Q3

Can I reuse suspension bolts after removal?

Subaru recommends replacing suspension bolts after removal, as they are often torque-to-yield (TTY) bolts designed for one-time use. Reusing them can compromise their integrity and lead to failure.

Q4

What happens if suspension bolts are over-torqued?

Over-torquing can stretch the bolts, damage threads, or cause component failure. Always use a calibrated torque wrench and follow the manufacturer's specifications to avoid compromising safety and performance.

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

A precision tool used to apply a specific torque to a fastener such as a nut or bolt.

  • Adjustable torque settings
  • Calibrated for accuracy
Learn more

Socket Set

A set of sockets in various sizes to fit suspension bolts and nuts.

  • Metric sizes
  • Durable construction
Learn more

Breaker Bar

A long-handled tool used to loosen tight bolts before applying torque.

  • High torque capacity
  • Ergonomic handle
Learn more
Service Procedures

Front Strut Mount Bolt Torque Procedure

Procedure to properly torque the front strut mount bolts on a 2007-2011 Subaru Impreza.

  • Lift the vehicle and secure it on jack stands.
  • Remove the front wheels to access the strut assembly.
  • Use a torque wrench to tighten the strut mount bolts to 22.5 lb-ft (30.5 Nm).
  • Reinstall the wheels and lower the vehicle.
View full procedure

Rear Shock Absorber Bolt Torque Procedure

Procedure to properly torque the rear shock absorber bolts on a 2007-2011 Subaru Impreza.

  • Lift the vehicle and secure it on jack stands.
  • Remove the rear wheels to access the shock absorber.
  • Use a torque wrench to tighten the shock absorber bolts to 33.2 lb-ft (45 Nm).
  • Reinstall the wheels and lower the vehicle.
View full procedure

Sway Bar Link Nut Torque Procedure

Procedure to properly torque the sway bar link nuts on a 2007-2011 Subaru Impreza.

  • Lift the vehicle and secure it on jack stands.
  • Locate the sway bar links on the front or rear suspension.
  • Use a torque wrench to tighten the sway bar link nuts to 33.2 lb-ft (45 Nm).
  • Lower the vehicle and test for proper suspension operation.
View full procedure
Technical Service Bulletins

Suspension Bolt Torque Specification Update

2009-05-15

Updated torque specifications for suspension components on 2007-2011 Subaru Impreza models.

2007-2011 Subaru Impreza

Resolution: Refer to the updated service manual for revised torque values and ensure proper tightening procedures are followed.

Front Strut Mount Bolt Loosening Issue

2010-08-20

Reports of front strut mount bolts loosening over time on 2007-2011 Subaru Impreza models.

2007-2011 Subaru Impreza

Resolution: Apply thread locker to the front strut mount bolts and torque to 22.5 lb-ft (30.5 Nm) as specified.

Rear Shock Absorber Bolt Corrosion

2011-03-10

Corrosion issues reported on rear shock absorber bolts for 2007-2011 Subaru Impreza models in regions with high humidity or road salt usage.

2007-2011 Subaru Impreza

Resolution: Inspect rear shock absorber bolts for corrosion and replace if necessary. Apply anti-seize compound during reinstallation and torque to 33.2 lb-ft (45 Nm).

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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