Audi A4 B9 Rear Door Central Lock Actuator Motor Left N/S 4G0839015F

Audi A4 B9 Rear Door Central Lock Actuator Motor Left N/S is an original locking mechanism component designed for the rear left side of the vehicle body. It ensures proper interaction with the door handle, latch, and electrical system, guaranteeing stable closing and secure locking of the door. This is a practical solution for users looking to restore full door functionality following a collision, wear and tear, or a factory lock failure.

Specifications and technical data

• SKU: 4G0839015F
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0839015F
• Substitutable numbers: 4G0839015F, 4G0 839 015 F
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function of the lock

The presented lock is dedicated to the rear left side of the vehicle, allowing for precise fitment to the door structure of the Audi A4 B9 generation. It is responsible for the mechanical locking and unlocking of the door, working in conjunction with the rods, cylinder, and central locking actuators. A correctly selected component eliminates issues with improper closing, self-opening, or lack of response to the remote control signal.

By using an original part from the Locks and Latches group, the factory mounting geometry and the correct operating characteristics of the mechanism are maintained. This is particularly important in vehicles equipped with advanced comfort systems, where the precision of the lock's operation affects the proper functioning of sensors and control modules.

Construction and technical compatibility

The rear left door lock in the Audi A4 B9 combines the mechanical part and components interacting with the vehicle's electrical system in a single housing. The design is intended for installation in factory mounting points, which facilitates service and reduces the time required for replacement. Using the correct part number and available interchangeable numbers allows for unambiguous identification of the component in the manufacturer's catalogs.

The element has been designed to operate in demanding conditions – with frequent door opening and closing, temperature changes, and exposure to moisture. The appropriate housing design helps protect the interior of the mechanism from contaminants, which translates into stable operation over a long period of use.

Condition, installation, and service application

The offered lock is a used part, which provides a cost-effective solution while maintaining the original manufacturer's specifications. This type of component is particularly recommended in situations where quick repair is necessary following mechanical damage to the door or a failure of the locking system, and the priority is to maintain the factory standard of workmanship.

In workshop practice, the lock is installed after removing the door trim, disconnecting the rods and electrical connectors, and removing the old component. Thanks to the factory fitment for the rear left side of the body, the replacement process is straightforward and does not require structural modifications. After installation, it is recommended to check the correct operation of the central locking system as well as the functionality of the interior and exterior door handles.

Benefits of using an original lock

Choosing an original door lock for the Audi A4 B9 allows you to maintain consistency with the other components of the vehicle's locking system. This is a solution that:

• maintains factory door fitment and the correct body line,
• supports the proper operation of the central locking system and comfort functions,
• reduces the risk of closing problems and unwanted door play,
• facilitates diagnostics during future service inspections.

If you are planning a comprehensive repair of the locking system or want to select other elements from the same group, it is worth browsing the offer in the Locks and Latches category to complete all the necessary components in one place.

Technical support and part selection

Selecting the correct lock for a specific version of the Audi A4 B9 should be based on the part number and interchangeable numbers, which minimizes the risk of error when ordering. In case of doubt, it is worth consulting a mechanic or using the manufacturer's catalog to confirm compatibility with the specific vehicle configuration and door equipment.

For users interested in a broader approach to the topic of used parts, selection procedures based on numbers, and optimization of repair costs, the following expert guide may be helpful: why it is worth considering the purchase of used mechanical components based on facts, not myths. It allows for a better understanding of the relationship between price, quality, and durability of components used in modern cars.

Additionally, to deepen your knowledge about vehicle operation and service, it is worth checking out the guide materials in our blog section: practical tips on selecting and replacing car parts, which help in making informed purchasing and service decisions.