how to replace the key fob battery for Tesla Model 3

Tesla Model 3 Highland (2024-present)

Error Codes

15-30 minutes

Time

easy

Difficulty

low

Severity

3 min read

442 words

Problem Statement

Learn how to replace the key fob battery for Tesla Model 3. Step-by-step instructions with tools and safety tips for a successful repair.

Affected Component

Electrical

Estimated Time

15-30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Be cautious when using the screwdriver to avoid damaging the key fob casing.

Symptoms

•Key fob not responding to button presses
•Range of key fob is significantly reduced
•Vehicle not recognizing the key fob upon approach
•Dashboard warning indicating key fob issue

Diagnostic Steps

1
Verify the current battery level of the key fob using a multimeter.
2
Check for physical damage or wear on the key fob.
3
Test the key fob with another Tesla Model 3 to confirm functionality.
4
Inspect the vehicle's key fob receiver for any faults or blockages.

Solution

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 flathead screwdriver
•Clean cloth

Parts Required

•CR2032 battery (replacement)

Related Faults

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Solution

1. Preparation

Tools Required: Small flathead screwdriver, replacement battery (CR2032), clean cloth.
Ensure the vehicle is parked and turned off.
Gather all needed tools and replacement parts.

2. Open the Key Fob

Use the small flathead screwdriver to gently pry open the seam of the key fob.
Start at the top edge and carefully work your way around to avoid damaging the fob casing.

3. Remove the Old Battery

Once the fob is open, carefully remove the old CR2032 battery from its compartment.
Note the orientation of the battery (positive side facing up) for the new battery.

4. Insert the New Battery

Place the new CR2032 battery into the compartment, ensuring the positive side is facing up.
Press down gently to secure the battery in place.

5. Reassemble the Key Fob

Align the two halves of the key fob and press them together until they snap back into place.
Ensure there are no gaps between the two halves and that the fob feels secure.

6. Test the Key Fob

Stand close to the vehicle and press any button on the key fob to check if it functions correctly.
Confirm that the vehicle recognizes the key fob and allows access.