why does my Tesla Model 3 Original (2017-2023) remote key fob not work

Tesla Model 3 Highland (2024-present)

Error Codes

15-30 minutes

Time

easy

Difficulty

medium

Severity

3 min read

506 words

Problem Statement

Learn how to troubleshoot and fix a non-working key fob for Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic steps and solutions.

Affected Component

Electrical

Estimated Time

15-30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle the key fob carefully to avoid breaking internal components.

Symptoms

•Key fob not responding to button presses
•Unable to lock or unlock the doors remotely
•The car does not recognize the key fob when attempting to start
•Indicator lights on the key fob not illuminating
•Possible 'Key not detected' warning displayed on the vehicle's dashboard

Diagnostic Steps

1
Replace the battery in the key fob to rule out power issues.
2
Check for any physical damage to the key fob, such as cracks or water exposure.
3
Attempt to pair the key fob with the vehicle using the Tesla app.
4
Scan the vehicle’s onboard diagnostics for any related error codes.
5
Verify that the vehicle's software is up to date.
6
Test the key fob in close proximity to the vehicle to rule out range issues.

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
•Replacement battery (CR2032)
•Clean cloth

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Replace the battery in the key fob to rule out power issues.
2
Check for any physical damage to the key fob, such as cracks or water exposure.
3
Attempt to pair the key fob with the vehicle using the Tesla app.
4
Scan the vehicle’s onboard diagnostics for any related error codes.
5
Verify that the vehicle's software is up to date.
6
Test the key fob in close proximity to the vehicle to rule out range issues.

Solution

1. Preparation

Gather tools: Small flathead screwdriver, replacement battery (CR2032), and a clean cloth.
Make sure to work in a well-lit area and handle components carefully.

2. Replace Key Fob Battery

Open the Key Fob
- Use the small flathead screwdriver to gently pry open the key fob casing.
- Take care not to damage the clips holding the fob together.
Remove Old Battery
- Carefully lift out the old CR2032 battery from its slot.
- Note the orientation of the battery for proper installation of the new one.
Install New Battery
- Insert the new CR2032 battery into the slot, ensuring the positive side (+) is facing up.
Reassemble Key Fob
- Snap the key fob casing back together until you hear it click securely.

3. Re-pair Key Fob with Vehicle

Access the Vehicle Settings
- Enter the Tesla Model 3 and go to the 'Controls' menu on the touchscreen.
Select Key Fob Option
- Choose 'Locks' from the Controls menu and select 'Add Key Fob.'
Follow On-Screen Instructions
- Follow the prompts to complete the pairing process, ensuring the key fob is close to the vehicle during this step.