WAI 84878 Window Regulator - Front Left

Direct-fit power window regulator

This WAI window regulator is a new, electric replacement for the front left door. It is built to meet or exceed OE manufacturing and performance specifications, with a direct-fit design for straightforward installation on compatible BMW applications.

Key features

• New power window regulator for electric window operation
• Hardened steel gear for durable drive performance
• Screw attachment type for secure mounting
• Plastic roller design for smooth window movement
• Installation instructions included
• Meets or exceeds OEM specifications

Detailed fitment and design

Fits 1993-1994 BMW 740i, front left. Fits 1993-1994 BMW 740iL, front left. Fits 1988-1994 BMW 750iL, front left. Fits 1988-1992 BMW 735i, front left. Fits 1988-1992 BMW 735iL, front left. This WAI 84878 is engineered as a direct replacement for the original power window regulator used in these BMW door assemblies. The hardened steel gear and electric operation support consistent window travel, while the new construction and OE-spec target help maintain proper fit and function. This part cross-references Genuine 51321938367 for the same application.

Common replacement issues

• Window glass will not move up or down with the switch
• Slow, uneven, or noisy window travel
• Broken regulator gear or roller wear
• Window drops inside the door or stops partway

Installation notes and quality

Use the included installation instructions to confirm door-panel access, regulator alignment, and switch operation before final assembly. Verify the electric connector, screw attachment points, and front left application before installation. WAI backs this part with a limited lifetime warranty. WAI 84878 is precision engineered with high-grade materials for fit, performance, and service life.