Volkswagen Golf Mk6 Rear Window Regulator Motor Mechanism Left N/S 5K4839729G

Volkswagen Golf Mk6 Rear Window Regulator Motor Mechanism Left N/S is an original component from the Window Regulators and Motors group, designed for precise operation of the window in the rear section of the vehicle on the driver's side. It ensures stable window operation, correct guidance, and proper integration with the vehicle's electrical system, which translates into comfort during daily use.

Specifications and technical data

• SKU: 5K4839729G
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 5K4839729G
• Substitutable numbers: 5K4839729G, 5K4 839 729 G, 5K4839755K, 5K4 839 755 K
• Location on the vehicle: Rear, Left
• Part type: Regulator & Motor Assembly
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented mechanism is dedicated to the rear left area of the body, where it is responsible for the smooth raising and lowering of the window. As an original Volkswagen part, it has been designed for specific guides, mounts, and operating parameters of the electric control system in the sixth-generation Golf, which minimizes the risk of mismatch and improper operation. The placement Rear – left means that the mechanical structure and mounting points are optimized for this specific position, ensuring the correct geometry of the window movement and the tightness of the door after closing.

Construction and technical fitment

The mechanism combines a set of guides with an electric drive, creating a complete system responsible for the vertical movement of the window. The use of an original design ensures:

• compatibility with factory mounting points in the rear left door,
• proper cooperation with the factory window control system,
• stable window guidance without excessive play or vibrations. An additional advantage is the presence of numeric part markings and interchangeable numbers, which facilitates the verification of compatibility with a specific vehicle equipment version and the selection of a replacement according to the manufacturer's markings.

Condition, origin, and benefits of choosing a used part

The item comes from the segment of original Volkswagen parts and is offered as a used component. This means it retains the factory construction and operating parameters intended by the manufacturer, while simultaneously reducing costs compared to a new subassembly. In practice, the user gains:

• factory fitment to the door and electrical system,
• reduced risk of installation problems typical of cheap replacements,
• a favorable price-to-functionality ratio when repairing the rear window area. If you want to better understand why choosing original parts from the secondary market is a rational solution in terms of technology and cost, it is worth reading the expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths. Although it mainly concerns drive units, it discusses universal principles of selecting parts by OEM numbers and analyzing the cost-effectiveness of purchasing used components.

Practical installation and maintenance tips

When replacing the window regulator mechanism in a Golf Mk6, it is recommended to follow the manufacturer's service procedures, particularly regarding the removal of door upholstery, disconnecting the electrical system, and resetting the window in the guides. Using an original mechanism significantly simplifies installation because:

• it does not require modifications to mounts or wiring,
• it allows for the use of factory adjustment points,
• it ensures predictable window behavior after reassembling the door. Thanks to this, the repair time is shorter, and the risk of re-disassembly due to inaccurate fitment of components is limited.

Expanding repairs within the window system

If you are planning a comprehensive repair or upgrade of the side window area in your Volkswagen and need other elements from the same group, such as additional mechanisms, motors, or complete regulator assemblies, check the available parts in the Volkswagen Window Regulators and Motors category. A well-chosen, original rear left window regulator mechanism for the Golf Mk6 allows you to restore the proper operation of the window system, improves vehicle comfort, and reduces the risk of further failures related to improper window operation or electrical system overload.