Audi A3 8L 3 Door Window Lifter Motor Regulator Front Right O/S 8L3959802

Audi A3 8L 3 Door Window Lifter Motor Regulator Front Right O/S is an original component from the Window regulators and motors group, designed for operation in the front right door of a 3-door body. It ensures stable control of the window movement, which translates into driver comfort, proper operation of the electrical system, and correct window closing during daily use.

Specifications and technical data

• SKU: 8L3959802
• Mark: Audi
• Condition: Used
• OEM Part Number: 8L3959802
• Substitutable numbers: 8L3959802, 8L3 959 802
• Location on the vehicle: Front, Right
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented window lifter motor is designed for installation in the front right door of an Audi A3 8L generation 3-door version. It is responsible for driving the window lifting and lowering mechanism, working in conjunction with the vehicle's electrical system and factory door switches. Thanks to its precise fit for the specific mounting location on the vehicle, it ensures correct window operation geometry and reduces the risk of jamming.

Construction and performance parameters

The Audi A3 8L 3 Door Window Lifter Motor Regulator Front Right O/S is an integrated electric drive that transmits torque to the window guide mechanism. The design is based on solutions used by the Audi brand at the factory, which facilitates installation in place of a worn-out component without the need for modifications to the wiring or mounts. The drive configuration used is optimized for operation in the driver or passenger door on the outer side, ensuring appropriate window movement speed and repeatability of lifting cycles.

Practical application and benefits of replacement

Replacing a worn-out window lifter motor with a functional unit from the same group allows for the restoration of full functionality of the window control on the right side. This is particularly important in the case of symptoms such as:

• no response of the window to control buttons,
• uneven or intermittent operation of the lifter,
• the window stopping halfway through its range of motion.

Selecting a component with the correct placement on the vehicle minimizes the risk of compatibility issues, and the use of an original Audi solution helps maintain the consistency of the door's electrical and mechanical system. This is a practical solution for users who want to technically restore the vehicle's factory functionality.

Condition and installation

The offered window lifter motor belongs to the group of used parts, which allows for an economical restoration of the window lifting system while maintaining the original design. A component of this type, after proper installation, can continue to operate within the standard load range intended for the front right door. It is recommended to entrust the installation to a person with experience in electrical systems and window mechanisms to ensure proper alignment of the guides and correct connection of the installation.

Audi window regulators and motors – expansion and service

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

Selection of used electrical components

When choosing used electrical system components, such as window lifter motors, it is worth being guided by the compatibility of the manufacturer's markings and the intended use for a specific mounting location. Procedures for selection by catalog numbers and an analysis of the cost-effectiveness of purchasing used parts compared to new replacements can be helpful. These issues are discussed more broadly in the expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths, which presents a practical approach to selecting components based on manufacturer markings and real operating costs.

Additional information about the differences between original, replacement, and used parts, as well as how to optimally select components for your car, is also provided in the guide Original, replacement, or used – which car parts are the most cost-effective?, which is helpful when planning broader service work on the vehicle.