Continental WR40074 Window Regulator - Front Left

Continental Front Left Window Regulator

Restore smooth window operation with this Continental window regulator, part number WR40074. It is a specific-fit, electric regulator for the front left door and is built for vehicles with power windows, making it a direct replacement for worn or failed original equipment units.

• Specific-fit window regulator for the front left position
• Electric operation for power-window systems
• Metal construction for dependable door-window support
• OE-style fit, form, and function for straightforward replacement
• Built in ISO TS certified facilities
• Compatible with BMW 525i, 530i, 545i, 525xi, 530xi, 528i, 528xi, 535i, 535xi, 535i xDrive, 528i xDrive, 535xi, 550i, and M5 front left applications

Fitment and Application Details

Continental WR40074 is made for BMW front left power-window applications across multiple 3 Series and 5 Series-era platforms, including 2004-2007 BMW 525i, 530i, 2004-2005 BMW 545i, 2006-2007 BMW 525xi, 530xi, 2006-2010 BMW 550i, 2007-2010 BMW M5, 2008 BMW 528xi, 535xi, 2008-2010 BMW 528i, 535i, and 2009-2010 BMW 528i xDrive, 535i xDrive. Part number WR40074 follows the original regulator layout for a direct service replacement.

This part cross-references Dorman - OE Solutions 749-102 for the same application.

Common Problems This Part Can Solve

• Window glass that will not raise or lower properly
• Slow, uneven, or jerky window movement
• Grinding or binding inside the door
• Window dropping out of alignment
• Failure of the original regulator mechanism from repeated use or weather exposure

Installation Notes and Quality Assurance

Verify the vehicle uses a front left, electric power-window setup before installation. This regulator is supplied without a motor, so reuse or replace the motor separately as needed. Continental builds this part to match OE fit and function, and the brand states its regulators are produced in ISO TS certified facilities for consistent manufacturing quality.