Audi A4 B9 Q5 FY Rear Door Lock Actuator Mechanism Right O/S Assembly 4G0839016F

Audi A4 B9 Q5 FY Rear Door Lock Actuator Mechanism Right O/S Assembly is an original component from the Locks and latches group, designed for the rear right side of the vehicle body. It ensures the proper operation of the locking mechanism, integration with the vehicle's electrical system, and stable door closing, which translates into safe and comfortable vehicle use. This solution is particularly beneficial for professional repairs or precise replacement of a damaged lock in Audi vehicles.

Specifications and technical data

• SKU: 4G0839016F-1
• 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 mechanism is designed to operate in the rear right area of the vehicle body, where it is responsible for mechanical locking and integration with the door opening and closing system. The vehicle placement defined as rear – right side allows for the unambiguous matching of the component to a specific mounting position, which reduces the risk of errors when selecting parts.

As an original Audi component, the lock maintains factory operating parameters, correct mounting geometry, and compatibility with standard guides, cables, and the electrical harness. Thanks to this, the installation process is straightforward, without the need for modifications or adaptations.

Construction and technical characteristics

The lock mechanism consists of a set of cooperating elements responsible for:

• locking and unlocking the door from the body side,
• transferring movement from the external and internal handle,
• cooperation with the central locking actuator (if present in the vehicle),
• stable maintenance of the door leaf in the closed position while driving.

The original Audi design ensures appropriate body rigidity, correct latch guidance, and proper positioning of elements interacting with the door sheet metal and the body pillar. As a result, the lock operates with predictable resistance, and the door closes in a repeatable manner without excessive play.

Condition, fitment, and service application

The offered lock is a used part, which in practice means it comes from disassembly and has been verified for further use. This type of component is particularly cost-effective for post-accident repairs, replacement after mechanical damage, or failure of the locking system.

By maintaining the manufacturer's original specification, the lock is the right choice wherever the goal is to:

• maintain factory door-to-body fitment,
• ensure proper cooperation with the central locking and vehicle electronics,
• reduce repair costs while maintaining OE standards.

Benefits of using an original Audi lock

Choosing an original lock mechanism for an Audi A4 B9 or Q5 FY allows you to avoid typical problems associated with replacement parts, such as inaccurate fitment, the need for mounting adjustments, or unreliable cooperation with the electrical system. The factory design ensures predictable performance in the long term, which is important for both user comfort and driving safety.

If you are planning a comprehensive repair of the locking system or want to select other elements from this group, it is worth browsing the full offer in the Locks and latches category, where you will find related door and body components.

Practical service tips and additional materials

When replacing the rear right lock, it is recommended to pay attention to the condition of the guides, cables, and door seals to avoid having to interfere with the same body area again. For vehicles operated in varied conditions, it is also worth periodically checking other vehicle systems, including the cooling system – especially in the summer season. You can find more on this topic in the guide on the impact of summer heat on the cooling system and the advantages of used radiators and fans, which will help optimize service costs while maintaining proper care for the car.

For users and workshops that want to deepen their knowledge about selecting used parts and their impact on vehicle operation, other guide materials available in the store's blog section will also be useful, including an article dedicated to the practical aspects of choosing used car parts. Thanks to them, it is easier to plan repairs, select appropriate components, and consciously manage your service budget.