Received more sensors on a 2005 Mercedes SL55 AMG. I installed them at BJ's and they worked for two days and then they all died. I contacted MoreSensor and was given a second kit which I installed with Discount Tire - works great. MoreSensor promised me a refund for installing it on the first set. Sent both installation bills to MoreSensors to see if they would refund the more expensive installation but they called and left a message saying they would refund the smaller of the two installations. Nice supportive people to chat with but don't like refunds. It's been six months now with no return. Good luck to me if I ever need a warranty claim within the next three years. M. Adams Charlotte, North Carolina