Dorman 749-621 Window Regulator - Front Left

Overview of Dorman 749-621 Window Regulator for BMW Models

The Dorman 749-621 window regulator is designed for electric window operation in select BMW vehicles. This replacement part is compatible with BMW 318i, 318is, 323i, 323is, 325i, 325is, 328i, 328is, and M3 models, providing reliable window control without the motor included.

• Gear material constructed from durable plastic
• Bolt-on attachment type for secure mounting
• Frame made from a combination of metal and plastic for strength and flexibility
• Electric window operation compatible, motor not included
• Includes one power regulator per package
• No mounting hardware or installation instructions included

Detailed Product Description

The Dorman 749-621 window regulator is engineered to restore smooth and consistent window movement in compatible BMW vehicles. Featuring a plastic gear and a mixed metal and plastic frame, this part balances durability with lightweight design. The bolt-on attachment type ensures a straightforward and secure installation process. While the motor is not included, this regulator is designed to work seamlessly with the existing electric motor system in your BMW 318i, 318is, 323i, 323is, 325i, 325is, 328i, 328is, and M3 models. This part number 749-621 is a direct replacement component that maintains factory specifications for window operation.

Common Applications and Problem Resolution

• Restores electric window functionality in BMW 3 Series and M3 models
• Replaces worn or broken window regulators causing window misalignment or failure
• Eliminates window noise or sticking during operation
• Addresses issues with window movement that is slow or unresponsive
• Provides a reliable solution for power window failure without replacing the motor

Installation Notes and Tips

Installation of the Dorman 749-621 window regulator requires removal of the door panel and careful handling of the window glass. Since mounting hardware and installation instructions are not included, it is recommended to have professional installation or consult a repair manual specific to your BMW model. Ensure the existing motor is functioning properly before installation, as this part does not include a motor. Use appropriate tools to bolt the regulator securely in place to avoid future issues.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, ensuring compatibility and durability. The 749-621 window regulator undergoes quality checks to provide consistent performance in BMW 3 Series and M3 vehicles. Please refer to Dorman's official warranty policy for specific coverage details related to this part.