Dorman 740-403 Window Regulator - Front Left

Reliable Window Regulator for BMW 318i, 318ti, 325i, 328i, and M3

The Dorman 740-403 window regulator is designed to restore smooth electric window operation in select BMW models. Engineered with durable materials, this part ensures consistent performance for your vehicle's door window system.

Key Features of Dorman 740-403 Window Regulator

• Gear Material: Plastic for quiet and efficient movement
• Attachment Type: Bolt on for secure installation
• Frame Material: Combination of metal and plastic for strength and flexibility
• Window Operation Type: Electric, compatible with power window systems
• Motor Not Included, allowing use with existing motor
• Installation Instructions Not Included
• Package Contains One Power Regulator

Detailed Description

The Dorman 740-403 window regulator is specifically designed for BMW 318i, 318ti, 325i, 328i, and M3 models. It features a plastic gear that provides smooth engagement with minimal noise, while the frame combines metal and plastic components to balance durability and weight. This bolt-on regulator is intended for electric window systems and does not include a motor, making it ideal for replacing a faulty regulator while retaining the original motor. The absence of mounting hardware and installation instructions means professional installation or prior experience is recommended.

Common Issues Addressed by This Window Regulator

• Electric window failing to move up or down smoothly
• Window stuck in one position due to regulator malfunction
• Grinding or unusual noises when operating the window
• Loose or unstable window glass movement
• Broken or worn-out window regulator components

Installation Notes and Tips

• Ensure compatibility with BMW 318i, 318ti, 325i, 328i, and M3 models before installation
• Requires bolt-on attachment; verify all bolts and mounting points are secure
• Motor is not included; retain existing motor or purchase separately if needed
• Professional installation is recommended due to lack of included instructions and mounting hardware

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. While this window regulator does not include a motor or mounting hardware, it is built with quality plastic gears and a sturdy metal/plastic frame to ensure reliable operation. Warranty details should be confirmed at the time of purchase, as coverage may vary.