I've had this problem as well. I think there is a computer chip in the key itself that will lock the car from starting if the panic button has been pressed or the car alarm is set off. Not to sure how to fix it though.
how i found the change the oxygen sensor in 2002 vw passat
Inside the transmission for both manual and automatic.
The 2002 Volkswagen Passat has 20 valves.
The 2002 Volkswagen Passat is a gas-powered vehicle.
The 2002 Volkswagen Passat has an inline 4 engine.
The 2002 Volkswagen Passat has a 5-speed manual.
The 2002 Volkswagen Passat has double overhead cam (DOHC).
The 2002 Volkswagen Passat's turning circle is 37.4 ft..
The 2002 Volkswagen Passat is 15 ft. 5.2 in. (185.2 in.) long.
The curb weight of the 2002 Volkswagen Passat is 3225 lbs..
The 2002 Volkswagen Passat has a drag coefficient of .27 Cd.
The maximum payload of the 2002 Volkswagen Passat is 1071 lbs..