BMW 3 Series F30 F31 F80 M3 Window Lifter Regulator Rear Left N/S 7351049

BMW F30 F31 F80 Rear Left Window Regulator Mechanism is an original part from the BMW Window Regulators and Motors category, designed for the rear left window in select BMW 3 Series models. This is a solution for users who expect reliable window operation, a stable guide, and correct interaction with the vehicle's factory electrical system.

Specifications and technical data

• SKU: 7281887
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7281887
• Substitutable numbers: 7281887, 51357281887, 7351049, PK
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Intended Use and BMW Fitment

The regulator is specifically designed for installation on the rear left side of the body, ensuring proper window guide geometry and compatibility with factory mounting points. Its precise fit for the BMW F30, F31, and F80 door construction allows for installation without bodywork modifications or interference with the door structure.

This part belongs to the group of BMW Window Regulators and Motors, meaning it works with original wiring harnesses, window switches, and comfort modules, maintaining factory control functionality.

Window Mechanism Construction and Function

The regulator is responsible for transferring power from the motor to the window and guiding it stably within the tracks. The mechanism's construction ensures:

• smooth raising and lowering of the window throughout its full range of motion,
• adequate support for the glass pane, limiting tilting,
• compatibility with the factory window control system on the driver's and rear passenger's sides.

By maintaining the original mechanism geometry, the window operates predictably, reducing the risk of motor overload, jamming, or excessive wear on the guides.

Benefits of Using an Original Regulator

Using an original regulator in a BMW 3 Series offers a range of practical operational benefits:

• Factory Fitment – mounting holes and attachment points match the door construction, simplifying installation and reducing repair time.
• Electrical System Compatibility – the mechanism works with the original window motor and comfort controls without requiring adaptation.
• Stable Window Operation – proper guidance minimizes vibrations and noise, improving interior acoustic comfort.

This solution is particularly recommended when replacing a damaged mechanism due to cable failure, broken mounts, or worn guide components.

Part Condition and Verification

The regulator is a used part obtained from disassembly, offering a cost-effective repair solution while maintaining the manufacturer's original specifications. Such parts are often chosen by workshops specializing in the BMW brand, as they allow for restoring correct window operation without the need for aftermarket alternatives with uncertain fitment.

Before installation, it is recommended to perform a standard inspection of the mechanism and correctly position the window in the guides to fully utilize the regulator's capabilities and avoid re-overloading the system.

BMW Window Regulators and Motors – Selection and Alternatives

If you are looking for other BMW Window Regulators and Motors for your car, check availability in our dedicated category: BMW Window Regulators and Motors. You will find a wide selection of window mechanisms and drives tailored to various models and generations.

Used Parts and Repair Cost-Effectiveness

When repairing body systems such as window mechanisms, many drivers also consider purchasing used powertrain components. For larger components like engines or transmissions, it is advisable to consult an expert guide that discusses facts and myths about used parts, selection procedures by identification numbers, and the relationship between cost and durability: Why Buying Used Transmissions and Engines is Worth It – Facts Instead of Myths.