how to fix the Tesla Model 3 Original (2017-2023) side mirror not adjusting

Tesla Model 3 Highland (2024-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

534 words

Problem Statement

Learn how to diagnose and fix the side mirror adjustment issue on Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or short circuits.
•Allow sufficient time for the vehicle to cool down if the door panel has been exposed to sunlight.

Symptoms

•Side mirror does not move when adjustment switch is pressed
•No sound or feedback when attempting to adjust the mirror
•Other mirrors function correctly
•Warning message displayed on the dashboard
•Mirror glass appears loose or misaligned

Diagnostic Steps

1
Inspect the adjustment switch for physical damage or wear.
2
Use an OBD-II scanner to check for any related error codes.
3
Test the adjustment switch with a multimeter to ensure it's functioning.
4
Visually inspect the wiring harness connected to the mirror for any frays or disconnections.
5
Remove the mirror cover to check the mirror motor connection.

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

•Torx screwdriver set
•Multimeter
•Trim removal tool
•OBD-II scanner

Parts Required

•Adjustment switch (if faulty)
•Wiring harness (if damaged)
•Mirror motor (if defective)

Related Faults

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Diagnostic Steps

1
Inspect the adjustment switch for physical damage or wear.
2
Use an OBD-II scanner to check for any related error codes.
3
Test the adjustment switch with a multimeter to ensure it's functioning.
4
Visually inspect the wiring harness connected to the mirror for any frays or disconnections.
5
Remove the mirror cover to check the mirror motor connection.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the vehicle's battery to ensure safety.

Tools Required:

Torx screwdriver set
Multimeter
Trim removal tool
OBD-II scanner

2. Inspect and Replace Adjustment Switch

Sub-steps:
1. Remove the door panel using a trim removal tool.
2. Locate the adjustment switch assembly.
3. Disconnect the wiring harness from the switch.
4. Test the switch with a multimeter for continuity.
5. If faulty, replace the adjustment switch with a new part.
6. Reconnect the wiring harness and reassemble the door panel.

3. Inspect and Repair Wiring

Sub-steps:
1. If the adjustment switch is functional, inspect the wiring harness for damage.
2. Use a multimeter to test for continuity along the wires leading to the mirror.
3. Repair any damaged wires by splicing and soldering or replace the harness if necessary.
4. Ensure all connections are secure and protective covering is restored.

4. Check and Replace Mirror Motor

Sub-steps:
1. Remove the mirror glass carefully from the housing.
2. Inspect the mirror motor for any visible damage or disconnection.
3. Disconnect the motor from the wiring harness and test for functionality with a multimeter.
4. If the motor is defective, replace it with a new part.
5. Reattach the mirror glass and ensure it is secured properly.