Audi A6 C8 Window Lifter Motor Door Rear Right O/S Drive Unit 4K0959812

Audi A6 C8 Window Lifter Motor Door Rear Right O/S Drive Unit is a precision component from the Window regulators and motors group, responsible for the stable and predictable operation of the rear right window. It enables smooth raising and lowering of the window, ensuring operational comfort and the correct functioning of the electrical system in the door.

Specifications and technical data

• SKU: 4K0959812
• Mark: Audi
• Condition: Used
• OEM Part Number: 4K0959812
• Substitutable numbers: 4K0959812, 4K0 959 812
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The motor is designed to operate in the rear right window area, where it is responsible for driving the window lifter mechanism. Its task is to convert the electrical signal from the vehicle's wiring into rotational motion, which controls the window's position. This allows the driver and passengers to conveniently manage ventilation and access to the vehicle interior using the control buttons.

Its location on the vehicle in the rear right part of the body means the component works with the door electrical system and comfort modules, which requires maintaining proper connection quality and correct installation.

Construction and technical characteristics

The window lifter motor belongs to the Window regulators and motors group, meaning it is a component of the system responsible for controlling window positions electrically. The design includes an integrated electric drive and a housing adapted for installation in the door, with appropriately placed mounting points and an electrical socket matched to the wiring in the Audi A6 C8.

As an Audi brand part, the motor is designed for compatibility with factory door equipment, which facilitates installation and reduces the risk of fitment issues. The drive's appropriate operating characteristics ensure the correct window movement speed and stable stopping at set positions.

Condition, application, and installation

The offered item is in used condition, which allows for an economical replacement of a damaged drive while maintaining functionality consistent with vehicle requirements. It works well as a replacement in cases of symptoms such as the window not responding to buttons, intermittent operation, or noticeable weakening of the drive.

During installation, it is recommended to:

• verify the electrical harness and connectors for corrosion and looseness,
• check the window guide mechanism to avoid excessive operating resistance,
• correctly set the window position after installation, in accordance with service procedures.

Benefits of using a dedicated motor

Using a dedicated window lifter motor in the Audi A6 C8 brings a number of practical benefits:

• Stable window operation – a properly selected drive minimizes the risk of jams and uneven movement.
• Consistency with the electrical system – matched connectors and operating parameters facilitate integration with the factory comfort system.
• Reduction of repair costs – replacing the motor itself is often more cost-effective than interfering with the entire door system.

For users considering the use of used modules and electronic components, a useful supplement may be a guide on selecting and installing such components, available in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Related components and service knowledge

The window drive system in modern cars works with comfort modules, door controllers, and the body electrical system. In the case of vehicles from other brands, such as BMW, failures of drive units and related systems can generate significant service costs – this is described in more detail in the material Emergency BMW E90 engines: check what can ruin your budget!, which shows how important conscious component selection and service prevention are.

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