Audi R8 42 Door Window Lifter Motor Unit Right O/S Side 420959802A

Audi R8 42 Door Window Lifter Motor Unit Right O/S Side is an original component from the Window regulators and motors group, designed for precise operation of the window in the right door of this Audi sports model. This used OEM component ensures factory-fit, stable operation of the window lifting mechanism, and predictable performance in daily use. It is a solution for users who expect a proven design and wish to maintain the consistency of the electrical system with factory specifications.

Specifications and technical data

• SKU: 420959802A
• Mark: Audi
• Condition: Used
• OEM Part Number: 420959802A
• Substitutable numbers: 420959802A, 420 959 802 A
• Location on the vehicle: Right
• Part type: Window Motor
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The window lifter motor is responsible for driving the mechanism that raises and lowers the window in the right door smoothly. Its placement on the right side of the vehicle means that the component is structurally adapted to the geometry of the door and the window guides in this specific area of the body. This ensures proper cooperation with the door frame, seals, and controls from both the driver and passenger panels.

In the case of the Audi R8 42, using a dedicated motor from the same model group allows for maintaining the correct operating parameters of the electrical system, including window movement speed, response to button signals, and the correct operation of comfort functions, if present in the specific vehicle configuration.

Benefits of using an original motor

Using an original window lifter motor in an Audi brings a number of practical advantages, important from both the user's and the service technician's point of view:

• factory fit for the right-side door structure, without the need for modifications to mounts or the electrical installation,
• preservation of the window mechanism operating parameters intended by the manufacturer,
• consistency with the existing control installation and comfort modules,
• easier diagnostics in the future thanks to the use of an OEM component.

A used element from this group allows for reduced repair costs while maintaining high manufacturing quality and compliance with Audi's factory standards. This is particularly important in sports cars, where the precision of fit and the stability of door mechanisms affect user comfort.

Part selection by numbers and vehicle compatibility

When selecting a window lifter motor for the Audi R8 42, it is crucial to compare the OEM part number and any interchangeable numbers with the vehicle documentation or the existing component. This allows you to verify full compatibility with the specific equipment version and model year, minimizing the risk of installation issues or incorrect operation after installation.

In case of doubt, it is worth using the VIN and service documentation to confirm that the selected motor belongs to the correct Window regulators and motors group for the specific Audi unit. This approach is especially recommended for cars with more complex electrical configurations.

Additional tips on the safe selection of used drive and control components, including procedures for selection by VIN and OEM numbers, can be found in our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths. Although the article focuses on larger subassemblies, the principles of verification and selection of OEM parts described there also apply well to elements from the drive and regulator groups.

Practical installation and operating tips

When replacing the window lifter motor in the right door of an Audi R8 42, it is worth paying attention to a few technical aspects:

• checking the condition of the window guide mechanism and cables to avoid overloading the newly installed drive,
• inspecting the electrical harness for mechanical damage or signs of corrosion on the connectors,
• properly setting the window in the guides after installation, which affects operating smoothness and sealing,
• performing a functional test from the control panel on both the driver and passenger sides.

A replacement carried out in this way allows you to fully utilize the potential of the original motor and reduce the risk of further service interventions in the right door area.

Expanding repairs within the window system

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