Audi A4 B9 Window Lifter Rear Door Right O/S Regulator Mechanism 8W0839462A

Audi A4 B9 Window Lifter Rear Door Right O/S Regulator Mechanism is an original part from the Window regulators and motors group, designed for the rear right side of the vehicle body. It ensures stable window guidance, proper power transmission, and consistent operation of the lifting and lowering mechanism, which directly affects the comfort of using the vehicle.

Specifications and technical data

• SKU: 8W0839462A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0839462A
• Substitutable numbers: 8W0839462A, 8W0 839 462 A
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented mechanism is dedicated to the rear right door of the Audi A4 B9 generation. It is responsible for the precise guidance of the window in the rails and for the safe transfer of torque from the drive to the window, which enables smooth opening and closing of the window in this part of the body.

As an element from the Window regulators and motors category, the lifter works with the window control system, ensuring proper movement geometry and reducing the risk of jamming or excessive play in the system.

Construction and technical characteristics

The lifter mechanism has been designed for the specific geometry of the rear right door, which guarantees a fit to the factory mounting points in the Audi. The design provides for proper cable or arm routing (depending on the version), so that the window movement is uniform over the entire height.

Key functional features of this element include:

• dedicated placement in the rear right part of the body,
• mounting geometry designed for a specific model,
• stable window guidance in the rails,
• adapted to work with the factory window control system.

Benefits of using an original mechanism

Using an original window lifter in the Audi A4 B9 allows you to maintain the factory operating parameters of the window and reduce the risk of operational problems. Precise fit to the door structure translates into proper window alignment, lack of unwanted noises, and stable operation throughout the full range of movement.

The main advantages include:

• maintaining the factory window operating characteristics on the rear right side,
• reducing the risk of overloads in the control system,
• easier diagnostics and service compared to replacements,
• consistency with other window system components in the vehicle.

Part condition and service application

The lifter comes from the used parts group, which makes it an attractive service solution in the event of a mechanism failure in the rear right door. This type of component is particularly useful for repairs where it is required to restore full window functionality without interfering with the door structure.

The element will work well both for a typical replacement of a damaged mechanism and for broader work related to restoring the efficiency of the window system in the Audi A4 B9.

Audi window regulators and motors – expansion and service

If you are planning a comprehensive repair or modernization of the door area in your Audi and need other elements from the same group, such as guides, drives, or complete window mechanisms, check the available parts in the Audi window regulators and motors category.

Practical service and operational tips

When replacing the lifter mechanism, it is worth paying attention to the condition of the window seals, guides, and mounting points in the door to avoid recurring faults. It is also good practice to check the operation of the other windows in the vehicle, which allows for early detection of any irregularities in other mechanisms.

For drivers interested in a broader view of operation and typical repairs in cars, a guide describing the most frequently serviced components may be helpful – you will find it in the article TOP 10 most frequently replaced parts in your car, which contains practical tips on planning your repair budget.

If you are also interested in the subject of potentially expensive failures in other popular models, it is worth reading the material Emergency BMW E90 engines: check what can ruin your budget!, which shows how a conscious approach to service allows you to limit unforeseen expenses.