Shop OEM BMW Part # 61318360877 (61-31-8-360-877, 61316945538). Seat Lumbar Switch (Right). Power Lumbar Switch - Repair or Replace If your power lumbar doesn't move, your power lumbar switch may be

Switch. Support. Lumbar. Seat.
Switch used for the adjustment of the Seat Lumbar. Adjust. SWIT. Included with: Switch assembly, Switch assy.

Seat Lumbar Switch

Power Lumbar Switch - Repair or Replace
If your power lumbar doesn't move, your power lumbar switch may be the culprit. Have a technician inspect your to see if your the switch needs to be replaced.