why is my Toyota Corolla E170 making a thumping noise when hitting bumps

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

535 words

Problem Statement

Learn how to diagnose and fix thumping noise in Toyota Corolla E170 suspension. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always use jack stands when working under a vehicle.
•Allow the vehicle to cool before performing any work on components that may have been heated during operation.

Symptoms

•Thumping noise when driving over bumps
•Increased vibrations felt in the cabin
•Uneven tire wear
•Poor handling or steering response
•Suspension components visibly damaged or worn

Diagnostic Steps

1
Inspect the suspension components visually for any signs of damage or wear, including struts, shocks, and bushings.
2
Check for loose or damaged mounting hardware on suspension components.
3
Test the struts and shocks by pushing down on each corner of the vehicle and observing the rebound.
4
Inspect the wheel bearings for play or noise when rotating the wheel.
5
Examine the tires for proper inflation and any uneven wear patterns.
6
Check for any debris or obstructions in the wheel wells that might be causing noise during movement.

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
•Jack stands
•Tire iron

Parts Required

•Struts or shocks (if worn)
•Suspension bushings (if damaged)

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Diagnostic Steps

1
Inspect the suspension components visually for any signs of damage or wear, including struts, shocks, and bushings.
2
Check for loose or damaged mounting hardware on suspension components.
3
Test the struts and shocks by pushing down on each corner of the vehicle and observing the rebound.
4
Inspect the wheel bearings for play or noise when rotating the wheel.
5
Examine the tires for proper inflation and any uneven wear patterns.
6
Check for any debris or obstructions in the wheel wells that might be causing noise during movement.

Solution

1. Preparation

Gather tools: socket set, torque wrench, jack stands, and a tire iron.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery before starting any work on electrical components.

2. Inspect and Replace Struts/Shocks

Lift the Vehicle:
- Use a jack to raise the vehicle and secure it on jack stands.
Remove Wheel:
- Use a tire iron to loosen the wheel bolts and remove the front or rear wheel where noise is occurring.
Remove Strut Assembly:
- Disconnect any brake line brackets or sensors attached to the strut.
- Remove the bolts securing the strut to the steering knuckle and the top mount.
- Carefully remove the strut assembly from the vehicle.
Inspect Strut for Damage:
- Check for oil leaks or physical damage on the strut.
Replace if Necessary:
- If damaged, install a new strut, ensuring it is aligned correctly.
- Torque the strut bolts to the manufacturer’s specifications (typically around 80-100 ft-lbs).
Reattach Wheel:
- Replace the wheel and tighten the lug nuts to the manufacturer’s specifications.

3. Inspect and Replace Bushings

Check Control Arm Bushings:
- Inspect the control arm bushings for cracks or excessive wear.
Replace Bushings if Necessary:
- Remove the control arm if bushings are worn, and replace them with new ones, ensuring proper alignment.
- Reinstall the control arm and torque the bolts to specifications.