BMW X1 E84 Window Lifter Regulator Electric Rear Left N/S 2990387

The BMW X1 E84 Rear Left Window Regulator Lift is an original part from the Window Regulators and Motors group, designed for precise operation of the rear left window in your BMW. It ensures stable window guidance, correct operation of the lifting and lowering mechanism, and maintains the system's factory functionality. This is a practical solution for users who want to restore the functionality of their rear window without compromising on fit.

Specifications and technical data

• SKU: 2990387
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2990387
• Substitutable numbers: 2990387, 51352990387
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Vehicle Application and Function

The presented regulator is designed for installation in the rear left part of the body, in the door area of the BMW X1 E84. It is responsible for the mechanical guidance of the window and cooperation with the drive, enabling smooth opening and closing of the window from the cabin switches. Thanks to its factory geometry, the part ensures proper window positioning in the guides and reduces the risk of jamming or excessive play.

A properly selected window regulator is crucial for:

• maintaining door seal and reducing external noise,
• stable window operation throughout its full range of motion,
• correct cooperation with the factory electric control system,
• maintaining comfort in the rear cabin.

Benefits of Using an Original BMW Regulator

Using an original BMW solution for the rear left window allows you to maintain the parameters specified by the vehicle manufacturer. The design is tailored to the X1 E84 doors, facilitating installation and minimizing the need for additional modifications. Factory fit translates to proper alignment with the window, mounting points, and other door components.

The main advantages of this solution include:

• compatibility with the factory window control system,
• maintaining the manufacturer-specified window travel range,
• stable glass guidance in the channels,
• the ability to utilize the existing electrical system and door hardware.

Characteristics of a Used Part

The offered regulator is a used part, sourced from disassembly, offering a sensible compromise between repair cost and maintaining the original BMW construction. This type of component is particularly attractive for maintenance repairs where restoring full window functionality while controlling the budget is a priority. A used OEM part allows for proper mechanism operation parameters without resorting to aftermarket replacements with uncertain fit.

Choosing a used window regulator is a common practice in professional workshops specializing in body and door frame repairs for premium vehicles, where compliance with factory specifications and predictable long-term performance are paramount.

Professional Installation and Window System Diagnostics

To fully leverage the potential of this part, installation in a specialized workshop experienced with the BMW X1 E84 door construction is recommended. Proper mechanism adjustment, checking mounting points, and regulating window position directly impact the durability of the entire system. During installation, it is advisable to inspect the condition of seals, guides, and the electrical system to prevent recurrence of the fault.

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

Additional Information and Technical Support

Before purchasing, it is advisable to compare your door configuration and the type of mechanism installed in your vehicle to ensure the selected regulator matches the original design. If you have any doubts, comparing data with service documentation or consulting a mechanic specializing in the BMW brand may be helpful.

If you are also interested in the operational aspects and potential repair costs for other models of this brand, you can find practical tips regarding critical engine units in the article BMW E90 Common Engine Failures: Find Out What Can Ruin Your Budget!, which will help you better plan your car's servicing and approach future vehicle investments consciously.