why does my Volkswagen Passat B8 (2015-2022) key fob not unlock the doors

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked safely and the ignition is off.

2. Replace Key Fob Battery

1. Use a small flathead screwdriver to gently pry open the key fob casing.
2. Remove the old battery (usually a CR2032) and replace it with a new one, ensuring correct polarity.
3. Snap the key fob back together securely.

3. Inspect Key Fob and Central Locking System

1. If the key fob still does not function, visually inspect it for cracks or signs of water damage.
2. If damaged, consider replacing the key fob.
3. Locate the central locking fuse in the vehicle's fuse box (refer to the owner’s manual for the exact location).
4. Remove the fuse and inspect it for continuity using a multimeter. Replace if faulty.
5. If the fuse is intact, proceed to check the wiring and connections to the locking mechanism for any loose or damaged wires.

4. Reprogram Key Fob (if necessary)

1. If the fob is still not working after battery replacement and inspection, it may require reprogramming.
2. Insert the key into the ignition and turn to the "On" position without starting the engine.
3. Press and hold the unlock button on the key fob for about 10 seconds, then release it.
4. Test the key fob by attempting to lock/unlock the doors.