Hyundai Sonata 2015-2019 Suspension Bolt Torque Specifications & Fastener Values
Hyundai Sonata 2015-2019

Hyundai Sonata 2015-2019 Suspension Bolt Torque Specifications

Detailed torque specifications for suspension bolts on the 2015-2019 Hyundai Sonata, 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 And Shock Absorber Mounting

Secures the struts/shock absorbers to the vehicle's frame and knuckle, maintaining proper suspension geometry and ensuring even tire wear.

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Value
80 ft-lbs (108 N·m)

Control Arm Mounting

Connects the control arms to the frame and knuckle, providing a solid attachment point for the suspension components and maintaining proper alignment.

1

Control Arm Bolts

M12 x 1.25
Torque Value
80 ft-lbs (108 N·m)
2

Lower Control Arm-to-Knuckle Bolts

M14 x 1.5
Torque Value
65 ft-lbs (88 N·m)
Important Notes
Estimated value based on industry standards.
3

Upper Control Arm-to-Frame Bolts

M12 x 1.25
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Estimated value based on industry standards.

Ball Joint And Tie Rod End

Secures the ball joint and tie rod end to the control arm and steering knuckle, allowing for smooth motion and articulation of the suspension components.

1

Ball Joint Nut

M16 x 1.5
Torque Value
41 ft-lbs (55 N·m)
2

Tie Rod End Nut

M14 x 1.5
Torque Value
36 ft-lbs (49 N·m)

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 are the torque specifications for the suspension bolts on a 2015-2019 Hyundai Sonata?

The torque specifications vary by component. For example, the front strut-to-knuckle bolts should be torqued to 65-80 Nm (48-59 lb-ft), while the rear shock absorber lower mounting bolts require 60-75 Nm (44-55 lb-ft). Always refer to the vehicle's service manual for exact specifications.

Q2

How often should suspension bolts be checked for proper torque?

Suspension bolts should be checked during routine maintenance, such as tire rotations or suspension inspections, typically every 10,000-15,000 miles. Additionally, after any suspension repair or component replacement, bolts should be re-torqued to ensure safety and performance.

Q3

Can over-tightening suspension bolts cause damage?

Yes, over-tightening can strip threads, damage components, or cause stress fractures. Always use a calibrated torque wrench and follow the manufacturer's specifications to avoid over-tightening.

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 bolt or nut.

  • Adjustable torque settings
  • Calibrated for accuracy
Learn more

Socket Set

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

  • Includes both metric and standard sizes
  • Durable construction
Learn more

Breaker Bar

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

  • High leverage for tough bolts
  • Durable steel construction
Learn more
Service Procedures

Front Suspension Bolt Torque Specifications

Procedure to apply the correct torque to front suspension bolts on a 2015-2019 Hyundai Sonata.

  • Lift the vehicle and secure it on jack stands.
  • Remove the front wheels to access the suspension components.
  • Use a breaker bar to loosen the front suspension bolts.
  • Tighten the front lower arm bolts to 80-100 Nm (59-74 lb-ft).
  • Tighten the front strut mounting bolts to 40-50 Nm (30-37 lb-ft).
  • Reinstall the wheels and lower the vehicle.
View full procedure

Rear Suspension Bolt Torque Specifications

Procedure to apply the correct torque to rear suspension bolts on a 2015-2019 Hyundai Sonata.

  • Lift the vehicle and secure it on jack stands.
  • Remove the rear wheels to access the suspension components.
  • Use a breaker bar to loosen the rear suspension bolts.
  • Tighten the rear lower arm bolts to 70-90 Nm (52-66 lb-ft).
  • Tighten the rear shock absorber bolts to 50-60 Nm (37-44 lb-ft).
  • Reinstall the wheels and lower the vehicle.
View full procedure
Technical Service Bulletins

Suspension Bolt Torque Correction

2017-05-15

Bulletin addressing incorrect torque specifications for suspension bolts in certain 2015-2019 Hyundai Sonata models.

2015-2019 Hyundai Sonata

Resolution: Ensure all suspension bolts are torqued to the updated specifications provided in the service manual.

Suspension Noise Investigation

2018-08-22

Bulletin regarding suspension noise complaints and recommended torque checks for suspension components.

2015-2019 Hyundai Sonata

Resolution: Inspect suspension bolts for proper torque and retighten as necessary. Replace any damaged components.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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