Dorman 740-958 Window Regulator - Front Left

Reliable Electric Window Regulator for BMW 1 Series Models

The Dorman 740-958 window regulator is designed specifically for the front left door of select BMW 1 Series vehicles, including the 1 Series M, 128i, 135i, and 135is. This electric window regulator offers a durable and precise solution for restoring smooth window operation.

• Compatible with BMW 1 Series M, 128i, 135i, and 135is front left door
• Electric window operation type for seamless control
• Durable plastic gear and housing materials
• Metal and plastic frame construction for strength and stability
• Bolt-on attachment type for secure mounting
• Maximum lift height of 18 inches and maximum width of 2 inches
• Regulator included; motor and mounting hardware not included

Product Details and Specifications

The Dorman 740-958 window regulator is engineered with a plastic gear and housing to provide reliable performance while maintaining lightweight construction. The frame combines metal and plastic materials to ensure structural integrity and resistance to wear. Designed for electric window operation, this regulator fits the front left door of BMW 1 Series M, 128i, 135i, and 135is models, offering a maximum lift height of 18 inches and a maximum width of 2 inches. The bolt-on attachment type allows for a secure and straightforward installation process. Please note that this product includes the regulator only; the motor and mounting hardware are not included, and installation instructions are not provided.

Common Applications and Problem Resolution

• Restores smooth and reliable window movement in BMW 1 Series front left doors
• Replaces worn or damaged plastic gears causing window binding or slipping
• Addresses window regulators that fail to lift or lower windows properly
• Solves issues related to broken or bent regulator frames
• Improves electric window operation when the regulator mechanism is faulty

Installation Notes and Tips

Installation requires removal of the door panel and careful handling of the window glass. Since mounting hardware and motor are not included, reuse existing components or acquire replacements separately. The bolt-on design facilitates alignment and secure attachment. Professional installation is recommended if unfamiliar with electric window regulator replacement procedures.

Quality Assurance and Warranty

Dorman manufactures this window regulator to meet or exceed OEM standards for fit and function on compatible BMW 1 Series models. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Verify warranty terms with the product documentation or supplier.