my Volkswagen Golf MK6 (2009-2014) key fob won’t unlock the doors, what do I do

Solution

1. Preparation

• Gather tools: small screwdriver, multimeter, replacement battery (CR2032), and possibly a new key fob.
• Ensure the vehicle is in a secure location and that you have access to the spare key if needed.

2. Replace Key Fob Battery

• 1.1 Open the key fob case using a small screwdriver or a flat tool.
• 1.2 Carefully remove the old battery.
• 1.3 Insert the new battery (CR2032), ensuring the positive side is facing up.
• 1.4 Snap the key fob case back together securely.

3. Reprogram Key Fob (if necessary)

• 2.1 Insert the key into the ignition and turn it to the ON position without starting the engine.
• 2.2 Press the unlock button on the key fob for 1-2 seconds, then release.
• 2.3 Turn the ignition OFF, then back ON.
• 2.4 Repeat the unlock process to ensure the key fob is synced with the vehicle.

4. Inspect Door Lock Actuators

• 3.1 Remove door panel (use a trim removal tool and screwdriver).
• 3.2 Check the door lock actuator for proper operation by applying 12V directly to it.
• 3.3 Replace the door lock actuator if it is not functioning.

Tools Required:

• Small screwdriver
• Multimeter
• Trim removal tool
• OBD-II scanner
• Replacement key fob battery (CR2032)

Parts Required:

• Replacement battery for key fob (CR2032)
• Potentially a new key fob or door lock actuator

Estimated Repair Time: 1-2 hours

Safety Warnings:

• Disconnect the vehicle battery when working on electrical components to avoid short circuits.