my Volkswagen Passat B8 (2015-2022) keyless entry isn’t working what can I do

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked in a safe area with the ignition off.
• Disconnect the vehicle battery to prevent any electrical short circuits.

2. Replace Key Fob Battery

• Tools Required: Flathead screwdriver, new battery (usually CR2032).
• Use a flathead screwdriver to carefully pry open the key fob.
• Remove the old battery and install the new battery, ensuring the positive side is facing the correct direction.
• Snap the key fob back together and test the functionality.

3. Inspect Keyless Entry Antenna/Module

• Tools Required: Torx screwdriver set, multimeter.
• Remove the trim panel from the area where the keyless entry antenna/module is located (typically near the rearview mirror or at the front of the vehicle).
• Inspect the wiring and connections for any signs of damage or disconnection.
• Use a multimeter to check for continuity in the wiring. Repair or replace damaged components as necessary.

4. Check Vehicle Battery Voltage

• Tools Required: Multimeter.
• Connect the multimeter to the vehicle battery terminals.
• Check for a voltage of at least 12.4 volts. If low, charge or replace the battery.

5. Reprogram Key Fob (if necessary)

• Tools Required: OBD-II scanner.
• Connect the OBD-II scanner to the vehicle’s diagnostic port.
• Follow the specific instructions in the scanner to reprogram the key fob to the vehicle.
• Test the keyless entry system to ensure it is functioning.