I am getting new tires, they tell me it will cost about $10 each tire for the "rebuild kit". Searched and found the TPMS valve cost way more than 10 bucks - whats the "rebuild kit"?? Can I do it myself down the road without re-mounting the tire?
How does the TPMS system work - I saw one diagram where the sensors wireless transfer info to a receiver, is this how our X5's work??

TPMS Rebuild Kits