WAI WPR1172LMB Window Motor and Regulator Assembly - Rear Left

Rear Left Window Motor and Regulator Assembly

The WAI WPR1172LMB is a rear left power window regulator and motor assembly for select BMW applications. It is built for direct replacement service on the rear driver-side window system, helping restore normal glass movement in the vehicle door.

• Part type: window motor and regulator assembly
• Rear left position for the rear driver-side door
• Direct-fit replacement for select BMW 5 Series and M5 models
• Fits 2001-2003 BMW 525i, rear left
• Fits 2001-2003 BMW 530i, rear left
• Fits 1999-2003 BMW 540i, rear left
• Fits 2000-2003 BMW M5, rear left
• Fits 1999-2000 BMW 528i, rear left

Application Details

This WAI WPR1172LMB assembly is specified for rear left power window service on BMW 525i, 530i, 540i, M5, and 528i models within the listed year ranges. It is a practical replacement when the original rear window regulator or motor no longer moves the glass correctly, operates intermittently, or has failed completely. This part cross-references no listed alternate part numbers in the provided data.

Common Repair Symptoms

• Rear window will not move up or down
• Window movement is slow, uneven, or stops partway
• Motor runs but the glass does not respond
• Grinding, binding, or slipping during window operation
• Rear left window remains stuck in one position

Installation Notes

Verify the vehicle year, model, and rear left door application before ordering. Compare the original regulator and motor assembly to confirm connector style, mounting points, and door-side placement match the replacement part. After installation, test window travel and switch operation before reassembling the door trim.

Quality Assurance

WAI manufactures electrical replacement components for automotive service applications. Part number WPR1172LMB is cataloged as a window motor and regulator assembly for the listed BMW fitments and should be matched to the vehicle application before installation.