BMW E90 LCI E91 Rear Door Window Lifter Electric Regulator Left N/S 7075883

BMW E90 LCI E91 Rear Door Window Lifter Electric Regulator Left N/S is an original component from the Window regulators and motors group, designed for the rear left window in the BMW 3 Series body. This used window regulator ensures factory-fitment, maintaining the correct window guidance geometry and proper integration with the vehicle's electrical system.

Specifications and technical data

• SKU: 7140589-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7140589
• Substitutable numbers: 51357140589, 7140589, 7075883
• Location on the vehicle: Rear, Left
• Part type: Window Regulator
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented electric window regulator is dedicated for installation in the rear left door of the BMW 3 Series E90 LCI / E91. It is responsible for smooth, controlled raising and lowering of the window, working in conjunction with the factory door switch and the comfort system. The design is engineered to withstand the loads resulting from daily use, reduce window guidance play, and minimize the risk of jamming. The placement on the vehicle in the rear left zone requires precise matching of the guide shape, mounting points, and the position of the motor relative to the door panel. Using an original BMW solution allows for maintaining the correct operating geometry of the mechanism and compatibility with factory mounting points.

Construction and performance parameters

The regulator belongs to the Window regulators and motors group, which means the mechanical part is integrated with the electric drive. The mechanism is based on a system of guides and cables that transfer the motor's torque into the linear movement of the window. This enables stable, uniform travel across the entire range of operation. Key performance features of this component include:

• dedicated fitment for the rear left side of the body,
• compatibility with factory electric window controls,
• mechanism operation designed to reduce noise,
• maintenance of the correct window raising and lowering speed. Thanks to the preservation of the original design, installation does not require modifications to the wiring or interference with the door structure, which translates into predictable service time and a lower risk of subsequent leaks or vibrations.

Condition, origin, and service application

The component comes from the BMW range and is marked as used, which in practice means it was previously operated in a vehicle but retains functionality allowing for further use. This type of part is particularly attractive in situations where a quick and economical repair of the window lifting system is necessary following mechanical damage or drive failure. In service applications, the regulator will prove effective both for typical replacement of a damaged mechanism and for restoring the efficiency of the electric window control after a side collision or door intervention (e.g., replacement of the lock, speakers, or wiring harness). Using an original solution reduces the risk of fitment issues and eliminates the need to adapt universal parts.

Benefits of using an original window regulator

Choosing an original electric window regulator for the BMW E90 LCI / E91 brings a number of practical benefits:

• factory fitment with the door structure and window,
• reliable cooperation with the electrical system and comfort control,
• reduction of the risk of rattling, play, and uneven window operation,
• suitability for use in professional bodywork and service repairs. For workshops and individual users, this means a stable repair result, predictable window behavior over time, and no need for additional adjustments resulting from the inaccuracies of aftermarket replacements.

BMW Window regulators and motors – expansion and service

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

Technical knowledge and part selection

When planning broader service work on VAG group cars or comparing repair strategies across different engine groups, the material discussing the specifics of TSI and TDI units and the use of original components from dismantling may be helpful – details can be found in the article VAG group engines – a comparison of popular TSI and TDI engines and repair possibilities using original parts from dismantling.