my Tesla Model S Original (2012-2020) is making a loud knocking sound

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

500 words

Problem Statement

Learn how to diagnose and fix a loud knocking sound in Tesla Model S (2012-2020). 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

•Disconnect the battery before working on electrical systems.
•Always use jack stands when working under the vehicle to prevent accidents.

Symptoms

•Loud knocking noise during acceleration or deceleration
•Noise may increase with speed
•Possible vibration felt through the vehicle
•Unusual wear on tires or suspension components
•"Check vehicle" warning message on the dashboard (if applicable)

Diagnostic Steps

1
Inspect the vehicle visually for any loose or damaged components in the suspension and drivetrain.
2
Lift the vehicle using a jack and safely secure it with jack stands to inspect the undercarriage.
3
Check the tightness of suspension bolts and bushings visually and with a torque wrench.
4
Listen for the knocking sound while the vehicle is stationary and in gear (using a stethoscope or mechanic's ear).
5
Scan the vehicle for any error codes using an OBD-II scanner to identify potential electronic issues.

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

•Jack
•Jack stands
•Socket set
•Torque wrench
•OBD-II scanner

Parts Required

•Suspension bushings (if worn)
•Control arms (if damaged)
•Motor mounts (if cracked or broken)

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Diagnostic Steps

1
Inspect the vehicle visually for any loose or damaged components in the suspension and drivetrain.
2
Lift the vehicle using a jack and safely secure it with jack stands to inspect the undercarriage.
3
Check the tightness of suspension bolts and bushings visually and with a torque wrench.
4
Listen for the knocking sound while the vehicle is stationary and in gear (using a stethoscope or mechanic's ear).
5
Scan the vehicle for any error codes using an OBD-II scanner to identify potential electronic issues.

Solution

1. Preparation

Tools Required: Jack, jack stands, socket set, torque wrench, OBD-II scanner.
Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
Disconnect the battery to prevent any electrical issues during repairs.

2. Inspect and Tighten Suspension Components

Sub-steps:
1. Remove the wheel for access to suspension components.
2. Visually inspect the control arms, bushings, and struts for wear or damage.
3. Using a torque wrench, tighten all suspension bolts to the manufacturer’s specifications (check owner’s manual for specifications).
4. Replace any worn bushings or components as needed.

3. Examine Drivetrain Components

Sub-steps:
1. Inspect the drive axles and CV joints for any signs of wear or damage.
2. Check the motor mounts for deterioration or breakage.
3. If damaged, remove the faulty components and replace them with new parts.
4. Reassemble and ensure all fasteners are torqued to specifications.

4. Test Drive

After repairs, reconnect the battery and take the vehicle for a test drive to confirm that the knocking sound has been resolved.