BMW Z4 E85 E86 Door Window Lifter Regulator Front Left N/S 7142237

BMW Z4 E85 E86 Door Window Lifter Regulator Front Left N/S is a component from the Window regulators and motors group, designed for precise operation in the front left door of the BMW Z4 E85/E86 generation roadster. This solution ensures the correct, smooth operation of the side window and stable integration with the factory comfort control system.

Specifications and technical data

• SKU: 7142237-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7142237
• Substitutable numbers: 7198909, 51337198909, 51217142237, 7142237, 51337013753, 7013753
• Location on the vehicle: Front, Left
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The window regulator is responsible for the controlled raising and lowering of the window in the front left door, working in conjunction with the factory switch and BMW electrical system. The component is structurally matched to the Z4 E85/E86 body, which ensures proper window guidance in the tracks and adequate cabin sealing while driving.

Thanks to the preservation of the original mounting geometry and guidance points, installation in the dedicated vehicle location is straightforward, with no need for modifications to the door or electrical wiring.

Benefits of using an original BMW solution

The window regulator from this series is designed for the specific body and door layout of the BMW Z4, which translates into:

• stable cooperation with factory window controls and comfort functions,
• proper fitment with the door structure and factory mounting points,
• correct window guidance, reducing the risk of misalignment or excessive play.

Choosing a component from this group allows for consistency with other door components, which is particularly important in cars with a rigid body structure, such as the Z4.

Installation and operational characteristics

The regulator is designed for operation in the front left part of the body, meaning its construction has been adapted to the specific shape of the driver's door in the Z4 E85/E86. The appropriate placement of mounting points facilitates service installation and subsequent adjustment of the window position.

The component comes from the Window regulators and motors group, making it compatible with the electric window drive and the factory anti-pinch safety features used in this model.

Product condition and service application

The offered window regulator is a used part, making it an attractive solution for service repairs where the priority is to maintain the original construction while optimizing costs. This type of component is suitable both for replacing a damaged mechanism and for restoring full door functionality after a collision or intensive use.

BMW window regulators and motors – expansion and completion

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

Technical support and knowledge about BMW models

When working with BMW vehicles, it is worth knowing the typical areas that require special service attention. If you are interested in what potential repair costs look like in other popular models of this brand, check out the article Faulty BMW E90 engines: check what can ruin your budget, which shows how to consciously approach the operation and service of BMW cars.