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 a factory-original component from the Locks and Latches category, designed for the rear left section of the vehicle body. It ensures the proper operation of the door locking and latching mechanism, which translates into safe vehicle use and stable integration with the electrical system and central locking system.

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 door lock

The presented lock is dedicated to the rear left door of the Audi A4 B8 model, where it is responsible for the mechanical latching of the door panel and interaction with the handle and linkages. The design provided by the vehicle manufacturer allows for stable load distribution during opening and closing, as well as proper door closing in various operating conditions.

By maintaining the original geometry and mounting points, the lock allows for precise alignment with the door sheet metal, pillar, and seals, which reduces unwanted play and noise while driving. This is particularly important for vehicles used over long distances, where acoustic comfort and the repeatability of the mechanism's operation are of great importance.

Construction and fitment for Audi A4 B8

As a component from the Locks and Latches category, the rear left door lock for the Audi A4 B8 has been designed to work with factory linkages, handles, and the vehicle's control system. The layout of the mounts and the shape of the housing are adapted to the door structure of this model, which facilitates installation and reduces the need for additional modifications.

The arrangement of mounting holes and working sockets is consistent with the factory standard, so that after proper installation, the lock maintains the correct position relative to the striker on the pillar. This allows for smooth door closing, proper latching, and stable interaction with the perimeter seal.

Benefits of using an original lock

Using an original door lock in the Audi A4 B8 brings a number of practical benefits in daily vehicle operation:

• preservation of the factory functionality of the door opening and latching mechanism,
• secure closing of the door panel without the need for excessive adjustment,
• compatibility with the existing control system in the vehicle,
• reduction of the risk of central locking malfunction or door not closing properly.

For the user, this means stable operation of the locking system and a lower risk of problems with access to the rear part of the cabin. In the case of replacing a damaged or worn component, such a lock allows for restoring the proper operation of the rear left door without interfering with the body structure.

Vehicle placement and installation aspects

The component is intended for installation in the rear left part of the body, which determines its geometry and the way it interacts with other door components. Correct placement on the vehicle makes it easier for the service technician to identify the correct mounting point and select the appropriate procedures for removing the upholstery and door equipment.

When replacing, it is recommended to follow the factory service sequence so as not to damage the wiring harnesses, linkages, or guide elements. Proper adjustment of the lock to the door affects the durability of the entire system and reduces the need for subsequent adjustments.

Condition and practical application

The offered rear left door lock for the Audi A4 B8 comes from the secondary market, which allows for an economical replacement of the component while maintaining the factory design. For many users, this is a reasonable solution when the priority is to restore full door functionality at controlled service costs.

In vehicles used intensively, especially in city traffic, lock mechanisms are exposed to frequent operating cycles. Replacing it with an original lock from the same design group allows for maintaining the technical consistency of the vehicle and ensuring predictable door behavior in daily use.

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

For those considering broader vehicle modifications using secondary market components, practical tips on selecting and installing used parts may be useful – you can find them in the article Tuning with used parts – how to gain performance without spending a fortune.