VW Volkswagen Golf 1K Electric Regulator Window Motor Left N/S 1K4839401D

The VW Volkswagen Golf 1K Rear Window Motor Left is an original part from the Window Regulators and Motors group, designed for the rear left side of the vehicle body. It ensures stable operation of the window lifting and lowering mechanism, contributing to user comfort and proper window sealing during daily use. This solution is dedicated to drivers who expect a proven design and a perfect fit for factory Volkswagen installations.

Specifications and technical data

• SKU: 1K4839401D
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 1K4839401D
• Substitutable numbers: 1K4839401D, 1K4 839 401 D
• Location on the vehicle: Left
• Category: Window Motors & Regulators

Purpose and Function in the Vehicle

The rear left window motor is responsible for driving the window lifting and lowering mechanism in the door. In conjunction with the factory control system, it forms a cohesive system that:

• enables smooth opening and closing of the window from the driver's panel or door button,
• works with the factory Volkswagen electrical system,
• maintains a stable window position after movement ceases,
• supports interior acoustic comfort through proper window sealing.

Thanks to its dedicated placement on the left side of the body, the component is structurally adapted to the door geometry and window guides in the Golf 1K model.

Compatibility and Fit for Volkswagen

The motor has been designed for use in Volkswagen vehicles, ensuring compatibility with factory connectors, mounting points, and electrical system operating parameters. Proper fitment for the Golf 1K platform minimizes the risk of installation issues and eliminates the need for wiring modifications.

Its original origin from the Window Regulators and Motors group promotes consistency within the entire window control system, both mechanically and electrically.

Characteristics of a Used Component

The offered motor is a used part, meaning it comes from a dismantled vehicle and has been previously operated. Such components are often chosen for repairs where the following are important:

• adherence to original manufacturer specifications,
• compatibility with factory door hardware,
• the possibility of an economical replacement for a damaged window drive.

For many users, this is a technically sound way to restore window system functionality while maintaining the original design.

Benefits of Using an Original Window Motor

Using a dedicated rear left window motor in the Golf 1K helps to avoid common problems associated with ill-fitting aftermarket parts, such as incorrect window travel or sealing issues. Key benefits include:

• secure fit to doors and guides – compliance with Volkswagen's factory design,
• seamless integration with the window control system – no need for installation modifications,
• maintained predictable mechanism operation in daily use,
• the ability to restore full functionality to the rear left window without interfering with other door components.

Volkswagen Window Regulators and Motors – Expansion and Service

If you are planning a comprehensive repair or upgrade of the door and window area in your Volkswagen and require other parts from the same group, such as window drives, control modules, or complete lifting mechanisms, check the available parts in the Volkswagen Window Regulators and Motors category.

Technical Knowledge and Additional Materials

When working with electrical systems and drives in modern cars, it is beneficial to be aware of the typical weak points of specific models. A good supplement to service knowledge can be an article dedicated to problematic powertrains in a popular Bavarian brand model – you can find it here: BMW E90 Faulty Engines: Find Out What Can Ruin Your Budget!. Although it concerns a different manufacturer, it demonstrates a practical approach to diagnosis and repair planning that can also be applied to servicing electrical systems and body hardware.