Audi A4 B9 Rear Door Lock Actuator Mechanism Right O/S Assembly 4G0839016F

Audi A4 B9 Rear Door Lock Actuator Mechanism Right O/S Assembly is an original locking mechanism component designed for the rear right side of the vehicle body. It ensures secure door latching, proper interaction with the door handle and the vehicle's electrical system, which translates into safe and stable closing during daily use. This is a solution for users who want to restore the factory functionality of the lock without compromising on quality.

Specifications and technical data

• SKU: 4G0839016F
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0839016F
• Substitutable numbers: 4G0839016F, 4G0 839 016 F
• Location on the vehicle: Rear, Right
• Category: Exterior Locks & Lock Hardware

Purpose and function of the door lock

The presented lock is dedicated to the rear right side of the body, ensuring it works precisely with the door structure and pillar of the Audi A4 B9 generation. It is responsible for the mechanical latching of the door, interaction with the handle linkages, and central locking control elements. A properly selected lock reduces play, minimizes the risk of improper closing, and supports the correct operation of safety systems.

The component belongs to the Locks and latches group, meaning it is part of a key system responsible for closing and locking the doors. Proper fitment to the specific model and side of the vehicle helps avoid assembly issues and incorrect mechanism operation.

Construction and fitment for Audi

The lock has been designed as an original part for the Audi brand, which translates into compatibility with factory mounting points and door geometry. The design provides for interaction with factory linkages, guides, and the wiring harness, ensuring that installation is orderly and predictable.

The placement on the vehicle, defined as the rear right side, allows for clear identification of the correct element when planning repairs. Such fitment reduces the need for modifications and ensures that the lock will work with the existing central locking installation and door opening system.

Condition, origin, and benefits of use

The offered lock comes from a group of used parts, which allows for combining reasonable repair costs with maintaining the manufacturer's original design. For many users, this is a practical way to restore door efficiency while maintaining consistency with other body components.

Using an original lock in an Audi A4 B9 brings a number of benefits:

• preservation of the factory method of locking and unlocking the door,
• proper interaction with the central locking and electrical system,
• fitment to the structure of the rear right side of the body,
• reduction of the risk of improper closing or locking of the door.

Thanks to this, you can effectively solve problems with opening, closing, or locking the rear passenger door without the need to use replacements with uncertain fitment.

Application in repairs and upgrades

The rear right door lock will work well both for a typical replacement of a damaged component and for broader body-mechanical work after a collision. It is particularly useful when symptoms such as no response to the central locking, problems with closing, or unstable door latching occur.

If you are planning a comprehensive repair of the locking system in your Audi and want to select other elements of this system as well, it is worth checking the entire offer in the Locks and latches category to complete all necessary components in one place.

Technical support and knowledge about used parts

When selecting used body elements and lock accessories, it is important to understand how to optimize repair costs without sacrificing quality. It may be helpful to read guide materials that discuss a practical approach to vehicle operation and maintenance using dismantled parts. In this context, it is worth checking out the article on the evolution of Volkswagen engines and optimizing repair costs with used parts, which shows how to consciously approach the selection of components.

Additionally, when planning broader service work on your car, general tips regarding diagnostics, part selection, and assessing the condition of used elements can be helpful. Many of these principles also apply to replacing door locks, where correct fitment, the condition of the mechanism, and compatibility with vehicle equipment count.