why does my Toyota Highlander Third Generation (2014-2019) make a knocking noise when driving

Toyota Highlander Third Generation (2014-2019)

Error Codes

4-8 hours

Time

medium

Difficulty

medium

Severity

3 min read

553 words

Problem Statement

Learn how to diagnose and fix knocking noise in Toyota Highlander 2014-2019. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Suspension

Estimated Time

4-8 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical or engine components.
•Use jack stands to support the vehicle securely before working underneath.

Symptoms

•Knocking noise varies with speed and road conditions
•Noise is more pronounced during acceleration or deceleration
•Possible vibration felt through the steering wheel or floor
•Uneven tire wear may be observed
•Occasional clunking sound when going over bumps

Diagnostic Steps

1
Inspect the suspension components for wear or damage, including control arms, bushings, and struts.
2
Check for loose or damaged exhaust system components that may create noise.
3
Examine the drivetrain components, including the CV joints and driveshaft for signs of wear or damage.
4
Perform a visual inspection of the engine mounts for cracks or deterioration.
5
Test drive the vehicle at various speeds to determine the specific conditions under which the noise occurs.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Socket set
•Torque wrench
•Strut spring compressor
•Impact wrench
•Wrench set
•Jack and jack stands

Parts Required

•Suspension control arms and bushings (if worn)
•Struts (if damaged)
•CV joints (if needed)
•Engine mounts (if cracked)

Related Faults

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Diagnostic Steps

1
Inspect the suspension components for wear or damage, including control arms, bushings, and struts.
2
Check for loose or damaged exhaust system components that may create noise.
3
Examine the drivetrain components, including the CV joints and driveshaft for signs of wear or damage.
4
Perform a visual inspection of the engine mounts for cracks or deterioration.
5
Test drive the vehicle at various speeds to determine the specific conditions under which the noise occurs.

Solution

1. Preparation

Gather tools and parts required for the repair.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to ensure safety during repairs.

2. Inspect and Replace Suspension Components

Sub-steps:
1. Raise the vehicle using a jack and secure it with jack stands.
2. Remove the front wheels to access suspension parts.
3. Inspect control arms and bushings for wear; replace if necessary.
  - Tools Required: Socket set, torque wrench.
4. Check struts for leaks or damage; replace if worn.
  - Tools Required: Strut spring compressor, socket set.
5. Reassemble all components and ensure all bolts are torqued to the manufacturer's specifications.

3. Examine and Repair Drivetrain Components

Sub-steps:
1. Inspect the CV joints for torn boots or excessive play; replace if damaged.
2. Check the driveshaft for any signs of wear or imbalance; replace if necessary.
  - Tools Required: Socket set, impact wrench.
3. Reinstall any removed parts and ensure proper alignment.

4. Exhaust System Inspection

Sub-steps:
1. Inspect the exhaust system for loose or damaged hangers and connections.
2. Tighten any loose bolts and replace damaged clamps.
  - Tools Required: Wrench set.
3. Ensure the exhaust does not come in contact with the undercarriage.

5. Engine Mount Inspection

Sub-steps:
1. Inspect engine mounts for cracks or excessive wear.
2. Replace any damaged mounts.
  - Tools Required: Socket set, torque wrench.
3. Ensure the engine is properly secured and aligned.