Key Fob Repair

RKH said:

The key is mechanical with a transponder chip inside and does not require any battery. It should be able to open all locks and drive the car.
The Fob with battery is just a remote transmitter to unlock the doors and trunk etc.

Click to expand...

for the 97 and maybe later years, not quite accurate. a regular key has a transponder in the key plastic. for the IR fob, there is a transponder in the IR remote housing. If it disappears, like when disassembly the IR remote, the car won't start. The transponder is small black chip in the housing.