FYI, my R56 was showing the four flat tire icon in the steering wheel display. I’m the original owner and figured I’d bite the bullet and buy four new sensors and valves. TPMS.com came through for me. I ordered the set matching the OEM part no. 36236798726. They came promptly and I had the local tire shop install them. They came pre-programmed. I just finished quite a bit of work on my 213000 mile MCS and took it for a spin and the tire warning light cleared within three-four miles of driving. Total price was about $210.

 

Awesome info I’m going to check them out. I just got a second set of rim that I need tpms for as they have rubber stems in them.