BMW 2 F45 Active Tourer Door Window Lifter With Motor Front Left N/S 2579945

BMW 2 F45 Active Tourer Door Window Lifter With Motor Front Left N/S is an original component from the Window regulators and motors category, designed for controlling the driver-side window in BMW 2 Series F45 models. This used OEM component ensures a factory fit, stable window operation, and predictable performance of the entire lifting system.

Specifications and technical data

• SKU: 2579945
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2579945
• Substitutable numbers: 51332579945, 2579945
• Location on the vehicle: Front, Left
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented window lifter with motor is designed for installation in the front left door, responsible for the smooth raising and lowering of the window. The integrated electric drive works with the factory cabin controls, allowing for full functionality of the original comfort system. Thanks to a design consistent with BMW solutions, this component operates with the correctly selected torque and mechanism travel, which reduces the risk of overloading the guides and the window itself.

Construction and technical fitment

The mechanism combines the part responsible for motion transmission and the electric motor in a single housing, which facilitates installation and service. The use of factory mounting points allows for precise positioning relative to the door, without the need for modifications or additional adapters. The construction is optimized for operation in the driver's door, with proper cable routing and arm geometry, which translates into stable window guidance throughout the entire range of motion.

Benefits of using an original mechanism

Using an original window lifter with motor in a BMW 2 Series F45 allows for maintaining the consistency of the entire electrical and mechanical door system. Key advantages include:

• factory fitment with the driver-side door structure,
• compatibility with the vehicle's electrical system operating parameters,
• stable window operation without jerking or excessive play,
• reduced risk of improper interaction with comfort modules.

As a result, replacing a damaged element with an original counterpart allows for restoring proper window operation without interfering with other door components. This solution is particularly beneficial for repairs where durability and compliance with factory specifications are prioritized.

Condition, verification, and selection by part numbers

The item is offered in a used condition, which allows for combining reasonable costs with the preservation of original build quality. Before installation, it is recommended to perform a standard check of the door's electrical system and verify the correct operation of the window guides so that the new mechanism is not burdened by additional resistance. Manufacturer markings and interchangeable numbers are helpful in selecting the correct window lifter, enabling precise matching to a specific equipment version.

If you want to better understand how to safely use used drive and electrical components, including how to use OEM markings when selecting parts, it is worth checking out our expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses practical identification procedures by numbers and real cost savings.

Expanding the window control system in BMW

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 additional motors, complete mechanisms, or control modules, check out the available parts in the BMW Window regulators and motors category.