VW ID4/ID6 Rear Door Lock Actuator Motor, Left – 4K0839015AA

The VW ID.4/ID.6 Rear Door Lock Actuator Motor, Left (Part Number: 4K0839015AA) is a specific part for the left-side rear door (driver’s side in left-hand drive markets) of the Volkswagen ID.4 and ID.6 electric vehicles. It is part of the central locking system, responsible for locking and unlocking the rear left door when the system receives a signal, such as from the key fob, the vehicle’s interior switches, or proximity sensors.

1. Part Description and Function:

• Purpose: The actuator motor is responsible for physically locking or unlocking the rear left door by activating the door latch. This happens when the vehicle’s central locking system sends a signal (from the key fob, interior button, or door handle).
• Location: As per the part number, 4K0839015AA is for the left rear door (driver side) of the vehicle.
• Motor Operation: Inside the actuator is an electric motor that moves mechanical gears. These gears engage or disengage the locking mechanism, securing or releasing the door latch.
• Electronic Integration: This actuator is integrated with the vehicle’s central locking system and often communicates with the body control module (BCM) for feedback and synchronization.

2. Part Number Breakdown:

• 4K0839015AA:
  • The “4K” prefix typically refers to parts used in the Volkswagen ID.4 and ID.6 electric vehicles.
  • The “0839015AA” part number is unique to this left rear door lock actuator motor, distinguishing it from other actuator motors (like the right-side or front door actuators).

3. Common Symptoms of Failure:

• Door Not Locking or Unlocking: If the rear left door fails to lock or unlock with the key fob or central locking button, the actuator motor may have failed.
• Motor Noise: If you hear strange buzzing, grinding, or clicking sounds coming from the door when attempting to lock/unlock, it could indicate that the motor or gears inside the actuator are damaged.
• Inconsistent Locking/Unlocking: The actuator may work intermittently, meaning the door sometimes locks and sometimes doesn’t, which points to a failing actuator motor.
• Visual Symptoms: The door may physically close, but the locking mechanism may not engage properly, meaning the door can be opened even when the car is locked.