how to fix the door locks not working in BMW 3 Series G20/G21 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the ignition is off.
• Disconnect the negative battery terminal to prevent accidental short circuits.

2. Remove Door Panel

• Use a socket set or screwdriver to remove screws securing the door panel.
• Carefully pry off the panel using a trim removal tool to avoid damaging clips.
• Disconnect any electrical connectors attached to the door panel (e.g., speaker wires).

3. Inspect and Replace Door Lock Actuator

• Locate the door lock actuator inside the door.
• If faulty, disconnect the actuator's electrical connector.
• Remove the screws or clips securing the actuator to the door.
• Replace with a new actuator, ensuring it is properly seated.
• Reconnect the electrical connector.

4. Reassemble Door Panel

• Reattach the door panel by aligning it with the clips and pressing it into place.
• Reinstall all screws removed during disassembly.
• Ensure all electrical connectors are reconnected.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Test the key fob and manual switch for proper functionality.