WAI WPR1174LMB Window Motor and Regulator Assembly - Rear Left

Rear Left Window Motor and Regulator Assembly

The WAI WPR1174LMB is a rear left window motor and regulator assembly for select BMW 5 Series applications. It is built for 1997-1998 BMW 528i and 540i models, plus 1999 BMW 528i and 540i models built to 03/1999.

Key Features

• Part number: WPR1174LMB
• Window motor and regulator assembly for the rear left door
• Compatible with 1997-1998 BMW 528i and 540i rear left applications
• Compatible with 1999 BMW 528i and 540i rear left applications to 03/1999
• Direct-fit replacement for BMW 528i and BMW 540i rear left power window service

Detailed Description

WAI WPR1174LMB is a rear left power window regulator and motor assembly made for BMW 528i and BMW 540i models in the 1997-1999 range listed above. This assembly restores the mechanical and electrical function of the rear left window system when the original regulator, motor, or both have worn out or failed. Use WPR1174LMB when servicing a rear left BMW 5 Series window that no longer moves correctly or has become unreliable.

What It Helps Fix

• Rear left window stuck in the up or down position
• Slow or uneven window movement
• Grinding, binding, or slipping during window operation
• Window motor failure on BMW 528i or BMW 540i rear left doors
• Regulator wear that prevents proper glass travel

Installation Notes and Tips

Verify the vehicle build date before ordering, since 1999 BMW 528i and 540i fitment applies only to vehicles built to 03/1999. Confirm rear left door application and compare the original unit to WPR1174LMB before installation. Check the window tracks, guides, and electrical connector condition during service to help ensure proper operation after replacement.

Quality Assurance

WAI manufactures electrical and body components for automotive repair applications. Part number WPR1174LMB is listed for the BMW 528i and BMW 540i rear left window application shown above.