Audi A4 B8 Door Lock Latch Mechanism Actuator Mount Rear Right O/S 8K0839016C

Audi A4 B8 Door Lock Latch Mechanism Actuator Mount Rear Right is a factory-original component from the Locks and Latches group, designed for the rear right body section. It ensures precise operation of the locking mechanism, correct interaction with the central locking actuator, and stable door mounting, which translates into safe and comfortable vehicle use.

Specifications and technical data

• SKU: 8K0839016C-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0839016C
• Substitutable numbers: 8K0839016C, 8K0 839 016 C, 8K0 839 016 F, 8K0839016F
• Location on the vehicle: Rear, Right
• Part type: Door Lock
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock is designed for installation in the rear right door area of the car, where it is responsible for the mechanical locking of the door panel and interaction with the central locking system. The integrated mechanism and actuator allow for:

• effective door locking while driving and when parked,
• correct opening and closing using the key or remote control,
• stable retention of the door in the closed position, without play or unwanted vibrations. Thanks to its fitment to the specific mounting position on the body, this component supports maintaining the correct door closing geometry and reduces the risk of leaks and improper handle operation.

Mechanism construction and actuator interaction

The lock combines a mechanical locking system with an electric drive in one housing, allowing for efficient communication with the vehicle's electrical system. The design provides:

• an internal ratchet mechanism responsible for physically blocking the lock tongue,
• an electric actuator controlling the bolt position in response to signals from the comfort module,
• mounting points matched to the factory mounting holes in the door. Such a solution facilitates service and replacement – after removing the door trim, the lock can be seated in place of the worn component, maintaining the original routing of cables and electrical harnesses.

Benefits of using an original door lock

Using a dedicated lock in the rear right body zone brings a number of practical benefits:

• Compatibility with the factory system – proper cooperation with the central locking, comfort electronics, and internal/external handles.
• Stable mounting – matched mounting points minimize stress on the door skin and reduce noise while driving.
• Repeatable mechanism operation – correct locking and unlocking reduces the risk of the door not closing properly or opening accidentally.
• Consistency with other body components – maintaining the factory standard of operation for all locks in the vehicle. For the user, this means more predictable door behavior, ease of operation, and maintaining the proper level of passive safety.

Installation zone and service recommendations

The component is intended for installation in the rear right part of the body, which requires access from the inside of the door after removing the trim. During installation, it is worth paying attention to:

• correct positioning of handle cables and internal levers,
• secure connection of the actuator's electrical connector,
• precise adjustment of the lock relative to the striker on the pillar to ensure smooth closing. After installation, it is recommended to check the lock operation several times using the remote, key, and handles to confirm correct locking and unlocking under all conditions.

Expansion of the lock system in Audi

If you are planning a comprehensive repair or upgrade of the door area in your Audi and need other components from the same group, such as locking mechanisms, actuators, or lock mounts, check the available parts in the Audi Locks and Latches category. For drivers interested in a broader approach to vehicle service and repair cost optimization, guide materials may also be useful – for example, an article describing operation and repairs in popular engines, available at the link BMW N47 Timing Chain – typical failure and repair using original BMW parts, which shows a practical approach to using parts in the automotive industry.