BMW 7 Series E65 E66 Window Lifter Rear Right O/S 7138864

BMW 7 Series E65 E66 Window Lifter Rear Right O/S is a component from the Window regulators and motors group, designed for the precise operation of the rear right window in luxury BMW 7 Series E65/E66 generation sedans. It is responsible for stable window guidance within the tracks as well as smooth raising and lowering, which directly impacts vehicle comfort and the proper operation of the entire door mechanism.

Specifications and technical data

• SKU: 7138864
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7490208
• Substitutable numbers: 51357138864, 7138864, 51357202482, 7202482, 51357024814, 7024814
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The window lifter used in the BMW E65/E66 in the rear right position is responsible for the mechanical transmission of power from the motor to the side window. The design is matched to the door geometry, ensuring:

• stable guidance of the glass pane throughout the entire range of motion,
• even raising and lowering without jamming,
• compatibility with the factory window control motor,
• proper sealing of the window within the door frame.

The dedicated placement on the vehicle eliminates fitment issues and allows for the preservation of the factory operating parameters of the window system.

Compatibility and identification parameters

The offered window lifter is a part intended for specific versions of the BMW 7 Series E65/E66, which facilitates the selection of the correct component during repairs. The element has an original OEM part number and assigned interchangeable numbers, making it easy to verify against service documentation or markings on the old part. The presence of multiple reference numbers increases the chance of compatibility with various equipment variants within the same model generation.

Performance characteristics and installation benefits

The BMW E65/E66 rear right window lifter has been designed as a component that works with the factory window control system. In practice, this means:

• the possibility of installation in place of a worn or damaged lifter without structural modifications,
• preservation of the original window operating speed and smoothness,
• proper cooperation with comfort modules and control functions from the door panel and remote key,
• restoration of the factory door seal level after proper window adjustment.

Thanks to the fitment for a specific position in the vehicle, the installation is predictable, and the risk of incorrect mechanism adjustment is limited.

Condition of the component and service application

The window lifter comes from the used parts group, which is a sensible solution for servicing older BMW generations, where both functionality and repair cost optimization are important. This type of component is particularly useful in situations where:

• the original mechanism has suffered mechanical damage (broken cables, broken guides),
• there are problems with smooth window movement,
• it is necessary to replace the complete mechanism instead of performing temporary repairs.

Using an original window lifter from the same model group allows for the restoration of proper window operation without interfering with the door structure.

BMW Window regulators and motors – expansion and service

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

Technical support and knowledge about BMW operation

When working with BMW vehicles, it is worth knowing the typical weak points of individual series to better plan service and avoid unnecessary costs. If you are interested in how engine failures can affect your car maintenance budget and want to better plan your vehicle's service, check out the article: Troublesome BMW E90 engines: check what can ruin your budget!