Audi A4 B8 Rear Door Window Lifter Motor Actuator Left N/S 8K0959811

Audi A4 B8 Rear Door Window Lifter Motor Actuator Left N/S is an original component from the Window regulators and motors group, designed for operating the rear left window in the Audi body. It ensures stable operation of the window lifting and lowering mechanism, which translates into user comfort and proper closing of the window opening.

Specifications and technical data

• SKU: 8K0959811
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0959811
• Substitutable numbers: 8K0959811, 8K0 959 811
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The motor is designed to work in the rear left part of the body, where it is responsible for driving the window lifting mechanism. Its task is to precisely transfer torque to the guides and cables so that the window moves smoothly, without jamming or excessive play.

Thanks to its proper fit to the Audi A4 B8 door system, this component works with the factory electrical installation and window controls, which allows maintaining consistent operation with other comfort modules.

Benefits of using an original motor

Using an original window lifter motor in an Audi brings a number of practical advantages:

• maintaining the factory operating characteristics of the window mechanism,
• proper cooperation with control buttons in the doors and the driver's panel,
• proper fit to the door mounts and geometry,
• reduced risk of overloading the guide mechanism.

Choosing such a solution is particularly important in vehicles where the consistency of comfort systems and maintaining parameters close to factory ones are important. Original Window regulators and motors help reduce the risk of improper window operation, noise, or incomplete closing.

Installation characteristics

The motor is intended for installation in the rear left part of the vehicle, which facilitates the identification of the correct installation location. The design intended for Audi allows for:

• consistent connection with the existing window lifting mechanism,
• connection to the factory electrical harness without the need for modifications,
• maintaining the correct window operating geometry relative to the seals and door frame.

This type of solution facilitates efficient component replacement in workshop conditions and also reduces the time required for diagnostics and mechanism adjustment.

Use of a used part

Choosing a used window lifter motor for an Audi is a reasonable compromise between cost and functionality. A component of this type, coming from dismantling, allows to:

• lower the cost of repair compared to a new part,
• maintain the original vehicle manufacturer's specification,
• avoid problems typical of some lower-quality replacements.

For many Audi users, this is a practical solution that enables restoring the efficiency of the window mechanism while maintaining an appropriate level of reliability.

Audi window regulators and motors – expansion and service

If you are planning a comprehensive repair or modernization 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 Audi window regulators and motors category.

Substantive support and additional information

When planning repairs of electrical and mechanical systems in a car, it is worth knowing the typical weak points of individual models. A good point of reference may be an article describing critical power units in a popular model of the Bavarian brand – you can find it here: Faulty BMW E90 engines: check what can ruin your budget!. Although it concerns a different manufacturer, it shows how important conscious selection of parts and preventive maintenance is.