BMW U06 Active Tourer Front Left N/S Window Lifter Regulator Mechanism 5A444C1

The BMW U06 Active Tourer Left Front Window Regulator is an original part from the Window Regulators and Motors group, designed for precise operation of the driver's window. The mechanism ensures stable window guidance, proper closing, and repeatable operation in daily use, which is crucial for driving comfort and safety.

Specifications and technical data

• SKU: 5A444C1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A444C1
• Substitutable numbers: 5A444C1, 51335A444C1, 5A104C1
• Location on the vehicle: Front, Left
• Category: Window Motors & Regulators

Vehicle Application and Placement

The presented mechanism is designed for installation in the front left door area, i.e., the driver's side. It is responsible for transferring the drive from the window lifting motor to the guides, enabling smooth opening and closing of the window in the BMW U06 Active Tourer. Thanks to its dedicated placement in the vehicle, the correct mounting points and window operating geometry are maintained.

Technical and Functional Characteristics

The mechanism belongs to the BMW Window Regulators and Motors group, meaning its construction is adapted to the factory window control system. The implemented design solutions ensure:

• stable window guidance in the rails during multiple operating cycles,
• correct transfer of torque from the drive to the lifting mechanism,
• compatibility with the factory door hardware in the BMW U06 Active Tourer,
• the possibility of using existing mounting points in the door.

Thanks to this, the regulator allows for the restoration of full functionality of the driver's side window control without the need for modifications to the installation or door structure.

Condition, Origin, and Benefits of Using a Used Part

The part comes from disassembly and is offered as a used BMW part, allowing for a reasonable cost while maintaining factory fit. In practice, this means:

• preservation of the original window operating geometry and mounting points,
• no need for adaptation or structural modifications,
• the possibility of an economical repair of the window lifting system while maintaining OEM standards.

This solution is particularly beneficial for post-accident repairs, mechanical damage to the guides, or operational wear of the mechanism.

Selection by Part Numbers and Installation Compatibility

The regulator is assigned a specific OEM reference and has interchangeable part numbers, which facilitates precise identification of the part in BMW catalogs and VIN-based selection systems. This allows for verification of compatibility with a specific equipment version and model year of the BMW U06 Active Tourer, minimizing the risk of purchasing an incompatible part. If in doubt, it is advisable to compare the markings with the currently installed mechanism or use professional verification by part numbers.

Technical Support and Additional Information

To better understand the advantages of using disassembled parts and how to select them correctly by OEM numbers, it is worth reading the expert guide on our blog: Why Buy Used Gearboxes and Engines – Facts Instead of Myths. The procedures and examples of selection by part numbers contained therein can be analogously used when verifying other components, including window mechanisms.

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