Volkswagen Golf Seventh Generation (2013-2020) key fob not working after battery change, what to do

Volkswagen Golf Eighth Generation (2020-present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

496 words

Problem Statement

Learn how to troubleshoot and fix a non-working key fob after battery replacement for Volkswagen Golf 2013-2020. Step-by-step guide included.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Be careful when prying open the key fob to avoid injury or damage to the internal components.

Symptoms

•Key fob not responding to lock/unlock commands
•Dashboard warning light indicating key fob issue
•No response from the vehicle when the key fob is pressed
•Physical key works but remote functions do not
•Intermittent key fob operation before complete failure

Diagnostic Steps

1
Verify that the new battery is installed correctly with the correct polarity.
2
Check the battery voltage using a multimeter to ensure it is functional.
3
Inspect the key fob for any physical damage, including cracked casing or damaged buttons.
4
Reset the key fob by removing the battery and pressing any button for 10 seconds before reinstalling.
5
Use an OBD-II scanner to check for any related error codes that might indicate a communication issue.
6
Test the key fob range to ensure it is within working limits.

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 flathead screwdriver
•Multimeter
•OBD-II scanner

Parts Required

•CR2032 battery

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Verify that the new battery is installed correctly with the correct polarity.
2
Check the battery voltage using a multimeter to ensure it is functional.
3
Inspect the key fob for any physical damage, including cracked casing or damaged buttons.
4
Reset the key fob by removing the battery and pressing any button for 10 seconds before reinstalling.
5
Use an OBD-II scanner to check for any related error codes that might indicate a communication issue.
6
Test the key fob range to ensure it is within working limits.

Solution

1. Preparation

Gather tools: small flathead screwdriver, multimeter, OBD-II scanner (optional).
Ensure you have a new battery of the correct type (e.g., CR2032).

2. Open the Key Fob

Use the small flathead screwdriver to gently pry open the key fob casing.
Be cautious to avoid damaging the clips that hold the fob together.

3. Replace the Battery

Remove the old battery and dispose of it properly.
Install the new battery, ensuring the positive (+) and negative (-) sides are aligned correctly.
Snap the key fob casing back together securely.

4. Key Fob Reset

Remove the battery again for 10 seconds.
Press any button on the key fob to discharge any residual power.
Reinsert the battery and close the fob.

5. Reprogram the Key Fob (if necessary)

Sit in the driver’s seat and close all doors.
Insert the key into the ignition and turn to the "On" position without starting the engine.
Press the "Unlock" button on the key fob for approximately 10 seconds.
Turn the key to the "Off" position and remove it.
Test the key fob to verify functionality.