WAI WPR1177RMB Window Motor and Regulator Assembly - Rear Right

Rear Right Window Motor and Regulator Assembly

The WAI WPR1177RMB is a rear right power window regulator and motor assembly for select BMW sedans from 1989-1995. It is built for direct replacement in the rear passenger-side window system, helping restore normal glass movement and motor operation.

• Fits 1989-1995 BMW 525i, rear right
• Fits 1994-1995 BMW 530i, rear right
• Fits 1994-1995 BMW 540i, rear right
• Fits 1989-1993 BMW 535i, rear right
• Fits 1991-1993 BMW M5, rear right
• Power window regulator and motor assembly for the rear right door
• WAI part number WPR1177RMB for fitment-based ordering

Application Details

This assembly is used on BMW 525i, 530i, 540i, 535i, and M5 models with rear right power window service needs. The WPR1177RMB combines the regulator mechanism and motor into one replacement unit, making it a practical choice when the window no longer raises, lowers, or stays aligned properly. This part cross-references common aftermarket listings for the same application.

Common Problems It Can Address

• Rear passenger window will not move up or down
• Window moves slowly or stops partway
• Grinding, binding, or uneven glass travel
• Motor runs but the window does not respond
• Regulator wear that causes the glass to tilt or slip

Installation Notes and Tips

Verify the vehicle year, model, and rear right position before ordering. Compare the original regulator and motor layout, connector style, and mounting points to confirm match-up with WPR1177RMB. Inspect the window guides, tracks, and switches during service so the replacement assembly can operate correctly after installation.

Quality Assurance

WAI supplies electrical and window system replacement parts for automotive applications, and this assembly is cataloged for the listed BMW fitments. Confirmed application coverage includes 1989-1995 BMW 525i, 1994-1995 BMW 530i, 1994-1995 BMW 540i, 1989-1993 BMW 535i, and 1991-1993 BMW M5, all in the rear right position.