Audi R8 42 Window Lifter Door Motor Drive Unit Passenger Side N/S 420959801A

Audi R8 42 Window Lifter Door Motor Drive Unit Passenger Side is an original component from the Window regulators and motors group, designed for precise operation of the window in the passenger door of the Audi sports model. The used OEM component ensures factory fitment, stable operation of the window lifting mechanism, and compatibility with the vehicle's electrical system.

Specifications and technical data

• SKU: 420959801A
• Mark: Audi
• Condition: Used
• OEM Part Number: 420959801A
• Substitutable numbers: 420959801A, 420 959 801 A, 420 959 802, 420959802
• Part type: Window Motor
• Category: Window Motors & Regulators

Purpose and function of the window lifter

The presented window lifter motor is dedicated to the passenger door of the Audi R8 42 series, where it is responsible for the smooth raising and lowering of the side window. Thanks to a design consistent with Audi's factory standards, the component works with the original comfort control system, maintaining the correct window movement speed and stability of positioning within the guides. As an OEM part from the Window regulators and motors category, the component has been designed to operate in the demanding conditions of a sports car – during frequent door opening cycles, temperature changes, and mechanical loads resulting from dynamic driving.

Benefits of using an original window lifter motor

Using an original window lifter motor in the Audi R8 42 allows for maintaining the consistency of the entire door system. In practice, this means:

• factory fitment to the mounts in the passenger door, without the need for bodywork modifications or installation adaptations,
• proper cooperation with the factory control module and door buttons,
• appropriately selected torque and operating speed parameters, which reduces the risk of overloading the window mechanism,
• preservation of acoustic comfort – the motor's operation is adjusted to Audi's interior soundproofing standards. The used OEM component is a reasonable compromise between cost and quality – you receive an original design, engineered specifically for this model, without the typical fitment issues that often appear with cheap replacements.

Condition, verification, and selection by part numbers

The window lifter with motor is offered as a used part, which in practice means it comes from disassembly and was previously used in a vehicle. Such components are frequently chosen for door repairs because they allow for cost reduction while maintaining the manufacturer's original specifications. The selection of the correct lifter motor for a specific version of the Audi R8 42 should be based on manufacturer markings and reference numbers. This minimizes the risk of incompatibility with the electrical harness, door mounts, or the window's range of motion. If you want to better understand how to safely purchase used drive and control elements based on manufacturer markings, the following expert guide will be helpful: Why it is worth buying used gearboxes and engines – facts instead of myths.

The importance of a properly functioning window lifter

A functional window lifter motor in the passenger door of the Audi R8 42 has a direct impact on the comfort of daily use and the safety of the vehicle. Improper operation of the mechanism can lead to:

• the window stopping in intermediate positions,
• excessive loads on guides and seals,
• overloading the door's electrical system,
• problems with window closure via the central locking system. Replacing a worn-out motor with an original element from the same design group allows for restoring the proper operation of the entire system, which is particularly important in premium class cars, where the precision of every component's operation counts.

Expanding repairs within the Audi window system

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, motors, or complete lifting mechanisms, check the available parts in the Audi window regulators and motors category. This allows you to refresh the entire window control system in one service stage, reducing the risk of further service downtime and ensuring consistent operation of all mechanisms in the vehicle's doors.