why does my Tesla Model S Plaid/Refresh (2021-present) have a knocking sound when driving

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

468 words

Problem Statement

Learn how to diagnose and fix knocking sound issues in Tesla Model S Plaid. 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 ensure the vehicle is securely lifted and supported when working underneath.

Symptoms

•Knocking noise during acceleration or deceleration
•Noise present when turning or cornering
•Vibration felt in the steering wheel
•Unusual tire wear observed
•Warning lights on the dashboard (potentially)

Diagnostic Steps

1
Inspect the vehicle's suspension components for any visible damage or wear.
2
Check wheel lug nut torque to ensure they are properly secured.
3
Scan for error codes using an OBD-II scanner to identify any electronic issues.
4
Conduct a test drive to replicate the knocking sound and note specific conditions (speed, turning, braking).
5
Inspect the tires for uneven wear or damage that could cause noise.
6
Examine the drivetrain components for any play or looseness.

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
•OBD-II scanner
•Tire pressure gauge
•Jack

Parts Required

•Control arms or bushings (if worn)
•Tires (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect the vehicle's suspension components for any visible damage or wear.
2
Check wheel lug nut torque to ensure they are properly secured.
3
Scan for error codes using an OBD-II scanner to identify any electronic issues.
4
Conduct a test drive to replicate the knocking sound and note specific conditions (speed, turning, braking).
5
Inspect the tires for uneven wear or damage that could cause noise.
6
Examine the drivetrain components for any play or looseness.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the 12V battery to ensure safety.

2. Inspect and Replace Suspension Components

Sub-steps:
- Remove the wheel to access the suspension components.
- Inspect the control arms, bushings, and struts for damage or wear.
- If any components are damaged, replace them with OEM parts.
Tools Required: Socket set, torque wrench, jack stands.

3. Check Wheel Lug Nut Torque

Sub-steps:
- Use a torque wrench to check the lug nut torque specifications (typically 129 lb-ft for Tesla Model S).
- If any lug nuts are loose, tighten them to the correct torque.
Tools Required: Torque wrench.

4. Address Drivetrain Issues

Sub-steps:
- Inspect the drive shafts and CV joints for any signs of wear or damage.
- Replace any damaged components.
Tools Required: Socket set, jack stands.

5. Tire Inspection and Replacement

Sub-steps:
- Examine the tires for uneven wear or bulges; replace if necessary.
- Ensure tires are properly inflated to manufacturer specifications.
Tools Required: Tire pressure gauge, jack, and jack stands.