how can I fix a dead key fob for my Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes

Time

easy

Difficulty

medium

Severity

3 min read

454 words

Problem Statement

Learn how to fix a dead key fob for your Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is turned off before working on the key fob to avoid accidental unlocking or starting.

Symptoms

•Key fob buttons do not respond
•No signal detected by the vehicle when approaching
•Vehicle does not unlock automatically
•Key fob LED indicator does not illuminate
•Unable to start the vehicle using the key fob

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter to confirm if it's dead.
2
Inspect the key fob for physical damage or signs of wear.
3
Verify that the vehicle is in range and not experiencing any other key fob interference.
4
Attempt to use a spare key fob to determine if the issue is with the fob or the vehicle itself.
5
Check for any software updates or issues with the vehicle's keyless entry system.

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
•Phillips screwdriver
•Multimeter

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the battery level of the key fob using a multimeter to confirm if it's dead.
2
Inspect the key fob for physical damage or signs of wear.
3
Verify that the vehicle is in range and not experiencing any other key fob interference.
4
Attempt to use a spare key fob to determine if the issue is with the fob or the vehicle itself.
5
Check for any software updates or issues with the vehicle's keyless entry system.

Solution

1. Preparation

Tools Required: Small flathead screwdriver, Phillips screwdriver, new CR2032 battery.
Ensure the vehicle is in a safe location and turned off.
Wear safety gloves to avoid static damage to electronic components.

2. Open the Key Fob

Use the small flathead screwdriver to gently pry apart the key fob casing along the seam.
Be careful not to damage the casing during this process.

3. Replace the Battery

Remove the old CR2032 battery from its compartment.
Dispose of the old battery properly.
Insert a new CR2032 battery, ensuring the positive side (+) is facing up.

4. Reassemble the Key Fob

Align the two halves of the key fob casing.
Press together firmly until the casing clicks back into place.
Ensure there are no gaps between the two halves.

5. Test the Key Fob

Stand near the vehicle and press any button on the key fob.
Check if the vehicle responds, indicating that the key fob is functioning correctly.