Seat Leon Mk2 1P Window Lifter Regulator Mechanism Rear Left N/S 1P0839401D

Seat Leon Mk2 1P Window Lifter Regulator Mechanism Rear Left N/S is an original component from the Window regulators and motors group, designed for the rear left window in the vehicle body. It ensures stable window operation, proper guidance within the rails, and secure closing and opening during daily use.

Specifications and technical data

• SKU: 1P0839461A
• Mark: Seat
• Condition: Used
• OEM Part Number: 1P0839461A
• Substitutable numbers: 1P0839461A, 1P0 839 461 A, 1P0839401D, 1P0 839 401 D, 3C 095 970 3E, 3C0959703E
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The window regulator mechanism is responsible for transferring power from the control system to the window in the rear left door. A correctly selected component guarantees:

• smooth raising and lowering of the window without jamming,
• proper window guidance within the rails,
• maintenance of a stable window position while driving,
• consistent operation with the vehicle's factory electrical system.

By using an original solution dedicated to the second-generation Seat Leon model, compatibility with factory mounting points and the standard wiring harness is maintained.

Benefits of using an original mechanism

Choosing a window regulator mechanism dedicated to a specific model reduces the risk of installation and operational issues. The component from this group ensures:

• secure fit to the door structure – compliance with factory geometry and mountings,
• proper cooperation with existing window controls,
• appropriate system rigidity, which reduces stress on cables and rails,
• maintenance of door sealing due to the correct position of the window relative to the seals.

This solution is particularly beneficial when replacing a damaged or worn-out regulator, especially when maintaining factory performance parameters and avoiding modifications is a priority.

Installation characteristics

The mechanism is designed for installation in the rear left part of the body, in place of the factory regulator. The design intended for this model allows for:

• installation in original door mounting points,
• connection to the standard electrical wiring harness,
• preservation of the factory window travel range,
• consistency with existing door trim elements.

With proper installation, stable window operation and comfortable control from the cabin switches are achieved.

Condition and origin

The offered mechanism comes from the Seat parts line and is a used component, which allows for an economical repair while maintaining the original design. It is a good solution for users who want to restore full functionality to the rear window without having to invest in more expensive replacements of uncertain origin.

Seat window regulators and motors – expansion and service

If you are planning a comprehensive repair or upgrade of the door and window area in your Seat and need other components from the same group, such as window drives, complete mechanisms, or control modules, check out the available parts in the Seat window regulators and motors category.

Part selection by numbers and economic aspects

When selecting components such as window regulator mechanisms, it is worth using manufacturer markings and interchangeable numbers to ensure full compatibility with the specific body version and equipment. In the case of used components, the cost difference compared to new solutions can be significant, while maintaining the functionality required for daily operation. You can find more about how to consciously approach the purchase of used components in the article Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses the practical aspects of selecting parts by OEM numbers and cost-effectiveness analysis.