Originally Posted by calxfire
It would be valuable information if anyone can tell us what size battery does the sensor need? I think that is a good idea to change batteries when replacing tires, but it would be good to bring your own new batteries specially when going to a tire shop.
Do the wheels have to be reinstalled in the same location or can they be moved around without confusing the ECU?
The TPMS on our cars isn't as sophisticated as alot of systems now on the market. I know even Kias have the system that tells you which tire low and what the pressure in each is, but the Crossfire does not do this. It doesn't matter what position the wheels are switched to, it just sees a sensors output and triggers the generic light for a pressure fault. I know, as I've had to check all 4 of them to find the one with low pressure (its always the last one).
I had a tire shop do mine and they switched the position of the wheels(I can tell by the curb rash locations) There were no issues at all, the car never missed them or saw a change... Everything works 100% with no further programing or adjustments needed.
I don't know about the batteries, as I didn't even think about it until now. There may be no batteries at all. I know the systems works off radio frequency transmission. I wouldn't be surprised if they are charged internally as the wheel turns...