Audi A4 B9 Rear Electric Window Regulator Mechanism Right O/S 8W0839462

Audi A4 B9 Rear Electric Window Regulator Mechanism Right O/S is an original component from the Window regulators and motors group, designed for the rear right window of the Audi body. This used mechanism ensures factory-fit, stable window operation, and the maintenance of proper guiding geometry, which is essential for both driving comfort and safety.

Specifications and technical data

• SKU: 8W0839462
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0839462
• Substitutable numbers: 8W0839462, 8W0 839 462
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented mechanism is dedicated to installation in the rear area, on the right side of the Audi A4 B9 generation body. It is responsible for the smooth raising and lowering of the window, working in conjunction with the factory electric door control system. Thanks to a design consistent with the manufacturer's solutions, proper window operation in the guides is maintained, stress on the glass is reduced, and the risk of jamming or misalignment is minimized.

Construction and fitment of the mechanism

The mechanism belongs to the group of components responsible for driving and guiding the window in the door, including the gear assembly and guides that work with the side window. Using an original Audi design allows for:

• maintaining compatibility with factory mounting points in the door,
• proper cooperation with the electrical system and window control,
• maintaining appropriate speed and smooth operation during window movement.

As a result, the installation proceeds in an orderly manner, without the need for bodywork modifications or interference with the electrical harness, and the entire system retains the parameters specified by the manufacturer.

Benefits of using an original mechanism

Using an original mechanism in the Audi A4 B9 allows you to restore proper window operation after a failure or wear of the previous component. Key advantages include:

• factory fitment with the door structure and glass,
• stable operation throughout the full range of movement, without excessive play,
• reduction of noise and vibration during window opening and closing,
• preservation of the vehicle interior's aesthetics and functionality.

A used component from this group represents a reasonable compromise between repair costs and quality maintenance, especially for vehicles used daily, where reliability and the proper functioning of basic features are important.

Condition, verification, and selection of parts

The mechanism comes from dismantling and is offered as a used part, which allows for a significant reduction in repair costs compared to new replacements. Before installation, it is recommended to perform a standard check of the door electrical system and verify the condition of the glass and seals to avoid overloading the lifting system.

When selecting a component from this group, it is worth paying attention to compatibility with the body version and the mounting side of the vehicle. In case of doubt, it is helpful to compare the construction with the currently installed mechanism and verify compatibility with Audi service documentation.

Audi window regulators and motors – expansion and repairs

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

Safety of purchasing used components

Choosing a used window regulator mechanism is often a conscious decision based on the cost-to-repair-effect ratio. To better understand the process of selecting used drive components, verification procedures, and the real cost differences compared to new elements, it is worth reading the expert guide Why it is worth buying used gearboxes and engines – facts instead of myths. Although it concerns other groups of parts, the principles described there regarding the approach to used components well illustrate how to rationally approach the purchase of items from the secondary market.

Additionally, if you want to learn more about the quality and durability of used automotive parts and dispel the most common concerns related to their operation, the article Used car parts: Myths and facts you need to know, which discusses the practical aspects of such purchases in an accessible way, will be helpful.