VDO WR40403 Window Regulator - Front Left

Front Left Window Regulator for BMW

The VDO WR40403 is a front left electric window regulator built for select BMW applications. It is an OE-style replacement that matches original fit, form, and function for a direct repair on the driver-side front door.

Key Features

• Front left mounting position
• Electric window operation
• Metal frame construction
• No motor included
• No mounting hardware included
• Built for OE-style fit and function

Detailed Description

VDO WR40403 is a replacement window regulator for BMW 318ti, 318i, 325i, 328i, and M3 front left applications. It is engineered to match the original regulator layout for smooth window movement and straightforward installation in the door assembly. This part cross-references Dorman - OE Solutions 740-403 for the same application.

VDO manufactures these regulators in ISO TS certified facilities and offers cable and gear style designs across domestic, Asian, and European passenger cars and light trucks. For BMW 318i, BMW 325i, and BMW M3 front left repairs, this regulator restores electric window function with a direct-fit replacement approach.

Common Problems This Part Helps Solve

• Window glass will not move up or down
• Slow, uneven, or binding window travel
• Broken regulator cables or worn gear components
• Window dropping inside the door
• Intermittent electric window operation

Installation Notes and Tips

Verify front left door fitment before installation. This regulator uses electric operation and does not include a motor, so reuse or replace the motor as needed based on the vehicle condition. Confirm the door panel, glass guides, and electrical connector condition before reassembly for proper operation.

Quality Assurance

VDO builds this window regulator to OE-style standards for fit, form, and function, with production in ISO TS certified facilities. It is intended to deliver reliable window operation for the listed BMW applications.