BMW E46 Coupe Vent Quarter Window Drive Motor Actuator Rear Left N/S 8238743

BMW E46 Coupe Vent Quarter Window Drive Motor Actuator Rear Left N/S is an original component from the Window regulators and motors group, designed for precise control of the rear quarter vent window in the coupe body style. It ensures stable operation of the window opening and closing mechanism, which translates into user comfort and proper ventilation of the rear cabin area.

Specifications and technical data

• SKU: 8238743-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8238743
• Substitutable numbers: 67158238743, 8238743, BG
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented actuator is dedicated for installation in the rear left part of the BMW E46 Coupe body. It is responsible for driving the vent quarter window, working in conjunction with the factory guide mechanism and the vehicle's electrical system. Thanks to its precise fit to the door and body structure, it maintains the factory window operating geometry and proper sealing of the window opening.

This component is particularly important in vehicles experiencing issues with the window closing, getting stuck in extreme positions, or failing to respond to button commands. Replacing the complete drive unit allows for restoring proper system operation without the need for interfering with the electrical installation beyond the standard installation procedure.

Construction and technical fitment

The actuator motor was designed by BMW as a component that works with the factory window control system in the E46 Coupe model. The design provides appropriate mounting points to the body and an electrical connector matched to the vehicle's wiring harness, which facilitates installation and reduces the risk of installation errors. Using an original drive unit allows for maintaining consistency with other comfort system components.

The drive operates in one strictly defined area of the vehicle – the rear left side – which is important when selecting parts. Proper placement on the vehicle minimizes stress in the window mechanism and ensures smooth movement throughout the entire opening range. This solution is particularly beneficial in daily use, where operational repeatability and predictable response to switch signals are essential.

Benefits of using an original actuator motor

Using an original vent window drive in a BMW E46 Coupe offers a number of practical advantages:

• maintaining the factory operating characteristics of the window mechanism,
• proper fitment to mounts and guides in the rear left part of the body,
• compatibility with factory window controls and electrical installation,
• reduction of the risk of additional installation modifications.

Thanks to this solution, the functionality of the vent window can be restored in an orderly manner, which improves the comfort of rear passengers and affects the overall ergonomics of vehicle use.

Component condition and service application

The offered actuator motor comes from the secondary market, which makes it an attractive cost alternative to new components while maintaining the manufacturer's original specifications. Such elements are frequently used in professional workshops specializing in BMW service, especially during comprehensive repairs of comfort systems and body electronics.

Replacing the vent window drive is recommended in situations where the existing component shows signs of wear, such as irregular operation, the window stopping in intermediate positions, or a complete lack of response to controls. Using an original actuator motor allows for reducing diagnostic time and focusing on precise installation and final window position calibration.

BMW Window regulators and motors – expansion and modernization

If you are planning a comprehensive repair or modernization of the side window area in your BMW and need other elements from the same group, such as front window drives, guide mechanisms, or additional actuators, check the available parts in the BMW Window regulators and motors category.

Support in selecting used components

When choosing elements from the secondary market, such as motors, actuators, or other drive components, it is worth being guided not only by price but also by compliance with manufacturer markings and the history of use in specific models. A good point of reference can be an expert guide discussing the practical aspects of purchasing used drive components – more information can be found in the article Why it is worth buying used gearboxes and engines – facts instead of myths, which covers, among other things, the topic of selecting parts by OEM markings and an analysis of the cost-effectiveness of such solutions.