Audi A5 8T Window Lifter Rear Door Left N/S Regulator Mechanism 8T8839461

Audi A5 8T Window Lifter Rear Door Left N/S Regulator Mechanism is an original component from the Window regulators and motors group, designed for the rear left side of the vehicle body. It ensures stable operation of the side window, maintaining correct guidance geometry and smooth movement throughout the entire lifting and lowering range. This is a practical solution for users who want to restore full functionality to the rear window in their Audi without compromising the factory design.

Specifications and technical data

• SKU: 8T8839461
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T8839461
• Substitutable numbers: 8T8839461, 8T8 839 461
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented mechanism is dedicated for installation in the rear left door area, where it is responsible for transferring drive from the window motor to the glass. Its task is to maintain proper guidance of the glass pane within the rails, which reduces the risk of jamming, misalignment, and excessive play during operation.

A properly selected window regulator mechanism contributes to:

• stable window closing at higher speeds,
• correct sealing of the door against the weatherstrips,
• acoustic comfort inside the cabin,
• seamless cooperation with the factory window control system.

Construction and fitment for Audi A5 8T

The mechanism has been designed specifically for the door construction of the Audi A5 8T generation, taking into account the frame shape, placement of mounting points, and the operating characteristics of the window. As a result, factory-standard fitment with the door panel and other elements, such as rails, seals, or upholstery, is maintained.

Key features include:

• dedicated placement in the rear left part of the body,
• compatibility with the factory window control system,
• preservation of the original vertical window operating geometry.

Performance characteristics and installation benefits

Replacing a worn or damaged mechanism with this component allows for the elimination of typical failure symptoms, such as uneven lifting, window dropping, or noisy operation at the end positions. Using an original construction from the Window regulators and motors group promotes predictable system performance in the long term.

Practical benefits include, among others:

• restoration of full window control functionality in the rear left door,
• increased comfort for rear-seat passengers,
• reduction of loads acting on the window motor due to proper window guidance.

Component condition and service application

The mechanism is a dismantled part, making it a cost-effective solution compared to new equivalents while maintaining the original Audi construction. It is suitable for both current repairs after a failure and for the preventive replacement of wear-and-tear components in the door area.

It can be used in:

• repairs following mechanical damage to the window or door,
• cases of rail and cable wear resulting in unstable window operation,
• comfort system service, when restoring proper cooperation with the control module is required.

Related components and additional information

If you are planning a comprehensive repair or upgrade of the door area in your Audi and need other elements from the same group, such as rails, window motors, or complete window control modules, check the available parts in the Audi Window regulators and motors category.

When planning broader service work, it is worth considering the general principles of selecting used components and optimizing repair costs – you will find practical tips in the article Comprehensive supply: From the engine to the smallest clip – how to source used car parts in one place?.

For users interested in a broader context of operation and potential repair costs of power units, the guide regarding common problems in selected models may also be helpful, e.g., Troublesome BMW E90 engines: check what can ruin your budget!, which shows how important conscious part selection and vehicle service planning are.