Audi A4 B8 Window Lifter Rear Door Right O/S Regulator Mechanism 8K0839462A

Audi A4 B8 Window Lifter Rear Door Right O/S Regulator Mechanism is an original component from the Window regulators and motors group, designed for the precise operation of the rear right window in your Audi. It ensures stable window guidance, proper power transmission, and reliable mechanism performance in daily use. This is a solution for users who expect factory-fit quality and a proven design instead of random replacements.

Specifications and technical data

• SKU: 8K0839462A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0839462A
• Substitutable numbers: 8K0839462A, 8K0 839 462 A
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and vehicle placement

The presented window lifter is designed for installation in the rear right part of the body, in the passenger door on the rear seat. It is responsible for the smooth raising and lowering of the window, working in conjunction with the factory electric controls. Thanks to its correct profile and mounting points, it fits the door structure without the need for modifications, which facilitates installation and reduces the risk of incorrect window alignment.

Construction and function in the window lifting system

The window lifter in the Audi A4 B8 acts as a key element of the system responsible for the movement of the window in the guides. Its tasks include:

• stable guidance of the window along the vertical axis,
• transferring torque from the drive to the lifting mechanism,
• maintaining the window in a set position without play or vibrations,
• cooperation with the factory comfort control system.

A well-chosen lifter reduces stress in the system, decreases operating noise, and minimizes the risk of jamming, which translates into more comfortable vehicle usage.

Benefits of using an original window lifter

Using a component from the same design line as the factory Audi equipment allows for maintaining the technical consistency of the entire system. The most important advantages include:

• Factory fit for doors and window guides – correct mounting points and mechanism geometry.
• Compatibility with the existing electrical installation and comfort control system.
• Reduced risk of improper window closing and leaks.
• Stable operation under typical vehicle operating conditions.

For the user, this means predictable window behavior, no need for additional adjustments beyond the standard installation procedure, and the preservation of acoustic comfort inside the vehicle.

Characteristics of the used component

The lifter comes from the secondary market, which allows for combining savings with the preservation of the original Audi design. A used component from this group, when properly verified, can still ensure the correct operation of the window lifting mechanism and be a reasonable choice for vehicle repair, especially when you want to maintain a factory solution instead of uncertain replacements.

Matching by part numbers and additional technical support

When selecting a window lifter for a specific version of the Audi A4 B8, it is crucial to compare the markings with the vehicle documentation or the removed component. In workshop practice, catalog numbers and manufacturer markings are often used to avoid mistakes when ordering parts. If you want to better understand how professional component selection by catalog numbers works and what the real benefits of choosing parts from the secondary market are, it is worth checking out our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths.

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 guides, lifting motors, or complete window mechanisms, check the available parts in the Audi window regulators and motors category.

Summary

Audi A4 B8 Window Lifter Rear Door Right O/S Regulator Mechanism is a solution for drivers who want to restore full functionality to the rear right window while maintaining the factory design concept. A properly selected and correctly installed lifter ensures smooth window movement, stable guidance in the tracks, and daily comfort, serving as a technically consistent element of the Window regulators and motors system in your Audi.