my Tesla Model 3 Original (2017-2023) key fob not working how to reset it

Tesla Model 3 Highland (2024-present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

435 words

Problem Statement

Learn how to reset a non-working key fob for Tesla Model 3 (2017-2023). Step-by-step guide for troubleshooting and fixing key fob issues.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in a safe location before performing any key fob repairs.

Symptoms

•Key fob not unlocking or locking the vehicle
•No response when pressing buttons on the key fob
•Vehicle unable to detect the key fob nearby
•Key fob indicator light not illuminating
•Difficulty starting the vehicle

Diagnostic Steps

1
Check the battery level of the key fob to ensure it is not dead.
2
Inspect the key fob for physical damage or water exposure.
3
Verify that the vehicle is updated with the latest software version.
4
Attempt to unlock or start the vehicle using the Tesla mobile app.
5
Try using another key fob (if available) to determine if the issue is with the fob or vehicle.

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

•Small flat-head screwdriver
•New CR2032 battery

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the battery level of the key fob to ensure it is not dead.
2
Inspect the key fob for physical damage or water exposure.
3
Verify that the vehicle is updated with the latest software version.
4
Attempt to unlock or start the vehicle using the Tesla mobile app.
5
Try using another key fob (if available) to determine if the issue is with the fob or vehicle.

Solution

1. Battery Replacement

Sub-steps:
1. Use a small flat-head screwdriver to gently pry open the key fob case.
2. Remove the old battery (CR2032) and dispose of it properly.
3. Insert a new CR2032 battery, ensuring the positive (+) side faces outward.
4. Snap the key fob case back together until it clicks securely.

2. Key Fob Reset

Sub-steps:
1. Sit inside the vehicle with all doors closed.
2. Press the brake pedal to power on the vehicle.
3. On the touchscreen, navigate to Controls > Locks.
4. Select Key Fob and then choose Forget Key Fob.
5. Exit the menu and press the key fob’s buttons to re-pair it with the vehicle. The vehicle should confirm the pairing.

3. Final Checks

Sub-steps:
1. Test the key fob by attempting to lock and unlock the doors.
2. Start the vehicle using the key fob.
3. Ensure that the key fob functions from a distance (within normal range).