Audi A4 B9 Rear Window Glass Regulator Lifter Motor Right O/S 8W0959812

Audi A4 B9 Rear Window Glass Regulator Lifter Motor Right O/S is an original component from the Window regulators and motors group, designed for operating the rear right window in Audi bodywork. Precisely matched to the factory window lifting system, it ensures stable operation of the mechanism and proper integration with the vehicle's electrical system.

Specifications and technical data

• SKU: 8W0959812
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0959812
• Substitutable numbers: 8W0959812, 8W0 959 812
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and vehicle placement

The presented motor is dedicated for installation in the rear right part of the Audi A4 B9 generation body. It is responsible for driving the window lifting and lowering mechanism, working in conjunction with the factory door controls and the central convenience module. Thanks to its proper placement within the door structure, it maintains the correct window operating geometry, which reduces the risk of jamming and uneven movement.

Technical and functional characteristics

The motor belongs to the Window regulators and motors group, meaning it is an integral part of the system responsible for smooth window position adjustment. The design intended for Audi ensures:

• compatibility with the factory window lifting mechanism in the rear right door,
• cooperation with original electrical harnesses and connectors in the Audi A4 B9,
• stable torque adapted to the weight of the glass and guides,
• operation under typical service conditions (frequent opening and closing cycles).

By using an original solution, consistency of operating parameters with other components of the convenience system is maintained, which is important for both durability and the proper functioning of the window control features.

Component condition and benefits of choosing a used part

The offered motor is in used condition, which allows for combining reasonable repair costs with maintaining the manufacturer's original specifications. In practice, this means:

• perfect fit to factory mounting points in the door,
• no need for electrical system modifications,
• preservation of the original window system operating characteristics.

For many premium car users, choosing a used, original component is a conscious technical decision – it allows maintaining the vehicle's consistency with the factory configuration while reducing service costs. You can read more about the trend of using used OEM parts in premium segment cars in the article Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026.

Why choose an original Audi motor

Choosing an original window lifting motor for the Audi A4 B9 minimizes the risk of compatibility issues that may arise with aftermarket replacements. Key advantages include:

• preservation of the factory logic of window control operation,
• secure fit to the door structure and guides,
• consistency with other elements of the convenience system.

Thanks to this, the repair or replacement of a damaged window drive is predictable in terms of the result – after installation, the motor should operate in a manner similar to the factory original, without the need for additional modifications.

Related components and technical knowledge expansion

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, control modules, or complete lifting mechanisms, check the available parts in the Audi window regulators and motors category.

For those interested in a broader context of operation and typical failures of drive units in premium class cars, the service guide regarding the popular BMW model, available in the article Emergency BMW E90 engines: check what can ruin your budget!, may also be useful. Although it concerns a different brand, it well illustrates how a conscious approach to parts selection affects long-term car maintenance costs.