Audi A8 D3 Rear Side Door Window Regulator Motor Panel Right O/S 4E0839850A

Audi A8 D3 Rear Side Door Window Regulator Motor Panel Right is an original component from the Window regulators and motors group, designed for the rear right door of the Audi A8 D3 generation. This solution allows for the restoration of proper electric window operation while maintaining factory specifications and compatibility with the vehicle's electrical system.

Specifications and technical data

• SKU: 4E0839850A
• Mark: Audi
• Condition: Used
• OEM Part Number: 4E0839850A
• Substitutable numbers: 4E0839850A, 4E0 839 850 A
• Location on the vehicle: Rear, Right
• Part type: Regulator & Motor Assembly
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented component combines an electric motor and a control panel responsible for the smooth raising and lowering of the window in the rear right door. It is mounted in the rear part of the body on the passenger side, working in conjunction with the factory wiring harness and the window guide mechanism. By using an original solution, the correct window operating speed, proper response to control button signals, and stable integration with the vehicle's comfort electronics are maintained.

Construction and technical properties

The regulator consists of an electric drive and a control panel responsible for transmitting signals to the window mechanism. The design was developed specifically for the rear right body zone of the Audi A8 D3, which ensures proper placement of mounting points and compatibility with factory mounting holes. This type of solution ensures:

• consistency with the original Audi comfort system,
• proper window guidance within the tracks,
• stable operation under typical operational load ranges.

Benefits of using an original used component

Choosing an original, used window regulator for an Audi allows you to maintain the factory operating parameters of the system without the need for replacements with uncertain characteristics. This type of component is designed for a specific body generation, which means it:

• eliminates the risk of fitment issues with the door,
• reduces the need for electrical installation modifications,
• facilitates diagnostics in the event of potential future faults. For users considering the purchase of used components for major drivetrain repairs, we recommend an expert guide on selecting components by identification numbers – detailed information can be found in the article Why it is worth buying used gearboxes and engines – facts instead of myths.

Mounting in the rear right body zone

The location in the rear right part of the vehicle means that the component is structurally adapted to this specific side of the body. In practice, this translates into:

• proper alignment of electrical connectors relative to the door wiring harness,
• correct positioning relative to the window guides,
• maintenance of sealing and proper mechanism operation under typical operating conditions. Such fitment is particularly important in luxury class vehicles, where the comfort of window operation and the refinement of the mechanisms have a direct impact on the perceived quality of use.

Summary and selection of other components

Audi A8 D3 Rear Side Door Window Regulator Motor Panel Right is a solution intended for users who want to restore full functionality of the electric window control in the rear right part of the vehicle, while maintaining factory operating parameters. A properly selected element from this group allows you to avoid compatibility issues and ensures consistency with the Audi comfort system. If you are planning a comprehensive repair or upgrade of the side window zone in your Audi and need other elements from the same group, such as drives, control modules, or complete lifting mechanisms, check the available parts in the Audi window regulators and motors category.