my Tesla Model 3 Original (2017-2023) makes a knocking noise when accelerating, what’s wrong?

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

531 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix knocking noise during acceleration in Tesla Model 3 (2017-2023). 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 12V battery before working on electrical systems.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Knocking noise during acceleration
•Noise may vary with speed or load
•Possible vibrations felt through the cabin
•Potential loss of power or hesitation during acceleration
•Unusual tire wear or alignment issues (if applicable)

Diagnostic Steps

1
Inspect the vehicle for any visible damage to the undercarriage or drivetrain components.
2
Check for loose or damaged engine mounts.
3
Examine suspension components (e.g., control arms, bushings, struts) for wear or damage.
4
Perform a road test to assess when the noise occurs (e.g., during acceleration, at a specific speed).
5
Use an OBD-II scanner to check for any fault codes related to the drivetrain or suspension.
6
Inspect the tires for uneven wear patterns that may indicate alignment 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

•OBD-II scanner
•Socket set
•Torque wrench
•Suspension tool kit
•Pry bar
•Jack
•Jack stands
•Alignment tool

Parts Required

•Engine mounts
•Suspension components (if needed)

Related Faults

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Diagnostic Steps

1
Inspect the vehicle for any visible damage to the undercarriage or drivetrain components.
2
Check for loose or damaged engine mounts.
3
Examine suspension components (e.g., control arms, bushings, struts) for wear or damage.
4
Perform a road test to assess when the noise occurs (e.g., during acceleration, at a specific speed).
5
Use an OBD-II scanner to check for any fault codes related to the drivetrain or suspension.
6
Inspect the tires for uneven wear patterns that may indicate alignment issues.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Disconnect the 12V battery to prevent electrical issues during inspection.

2. Inspect and Replace Engine Mounts

Tools Required: Socket set, torque wrench, pry bar
Instructions:
1. Lift the front of the vehicle with a jack and secure it with jack stands.
2. Remove the engine cover to access the engine mounts.
3. Inspect the engine mounts for signs of wear or damage.
4. If damaged, use a socket set to remove the bolts securing the engine mount.
5. Install the new engine mounts and torque the bolts to the manufacturer’s specifications.
6. Reinstall the engine cover.

3. Inspect and Replace Suspension Components

Tools Required: Socket set, torque wrench, suspension tool kit
Instructions:
1. Remove the wheels to access the suspension components.
2. Inspect control arms, struts, and bushings for wear or damage.
3. If any component is found to be faulty, remove it using the appropriate tools.
4. Install the new part and torque all bolts to specifications.
5. Reinstall the wheels and lower the vehicle.

4. Perform Wheel Alignment

Tools Required: Alignment tool (or take to a professional)
Instructions:
1. After replacing suspension components, perform a wheel alignment.
2. Adjust camber, caster, and toe angles according to manufacturer specifications.