Audi A4 B8 Rear Door Left N/S Mechanism Lock Actuator Latch 8K0839015C

Audi A4 B8 Rear Door Left N/S Mechanism Lock Actuator Latch is an original component from the Locks and latches category, designed for the rear left side of the vehicle body. It ensures the proper operation of the locking and latching mechanism, which translates into secure door closing and stable integration with the vehicle's factory electronics. This is a solution for users who expect precise fitment and the preservation of the lock's factory operating parameters.

Specifications and technical data

• SKU: 8K0839015C-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0839015C
• Substitutable numbers: 8K0839015C, 8K0 839 015 C
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function of the rear left door lock

The presented lock is dedicated to the rear left part of the body, where it is responsible for mechanical latching and interaction with the door opening and closing system. This component handles the loads resulting from daily use, which is why its proper operation is important for both user comfort and the safety of passengers in the back seat.

Thanks to a design consistent with solutions used by Audi, the lock works with factory handles, linkages, and the vehicle's electrical system, minimizing the risk of problems with closing, looseness, or incorrect central locking response.

Benefits of using an original Audi lock

Choosing a door lock dedicated to a specific position on the vehicle allows for maintaining the structural consistency of the entire locking system. In practice, this means:

• stable door latching during daily use,
• proper cooperation with the factory central locking and remote control,
• appropriate fitment to the door panel and guides,
• reduced risk of slamming, improper closing, or accidental opening while driving.

The original rear left side lock in the Audi A4 B8 allows for maintaining consistent operation of all door mechanisms, which is particularly important during intensive vehicle use, frequent opening and closing, and operation in urban conditions.

Characteristics of the component from the Locks and latches category

The element belongs to the Locks and latches group, i.e., sub-assemblies responsible for physically locking and unlocking the doors. In the case of the rear left side, it is important that the lock:

• ensures proper positioning of the lock tongue relative to the pillar,
• maintains a stable connection with the internal and external handle linkages,
• is compatible with factory mounting points in the door.

This type of design allows for maintaining the factory door operating geometry, which limits the need for additional adjustments after installation and facilitates future service.

Condition of the component and practical application

The product is offered as a used original component, which in practice means that it comes from vehicle dismantling and has been verified for its suitability for further use. For many users, this is a reasonable compromise between cost and maintaining factory-quality fitment and mechanism operation.

A rear left side lock selected in this way will work well both for standard repairs after a mechanism failure and for replacing the element after bodywork damage, when it is necessary to restore full door functionality.

If you are planning a comprehensive repair or upgrade of the door locking zone in your Audi and need other elements from the same group, such as latching mechanisms, cylinders, or central locking actuators, check the available parts in the Audi Locks and latches category.

Additional information and technical advice

When replacing the rear left side lock in an Audi A4 B8, it is worth paying attention to the correct alignment of the door relative to the body, as well as the condition of the seals and hinges, to fully utilize the capabilities of the newly installed component. Proper installation reduces noise, water ingress, and unwanted vibrations while driving.

If you are considering a wider range of modifications or repairs using dismantled components and want to optimize costs without sacrificing safety, the guide material regarding this approach may be helpful – you will find it in the article Tuning with used parts – how to gain performance without spending a fortune.