Called the dealer today to ask about the cost of 4 new TPMS as I want to get 4 new wheels for my snow tires. The parts guy told me they were 130 dollars plus taxes each! What the heck? How can you buy 4 monitors on Ebay for 50 bucks? Does anyone know if there is something special about the QX30 ones? Are they Nissan Parts or Mercedes? I really don't want to pay them 600 Bucks if I don't have to.