I drive an 02 Lancer, i figured out the catalytic converter isnt bad and its just my exhaust loose because of broken welds. (I purchased my car with aftermarket exhaust that i cant name and crappy ebay air filter.) It needs a lot of work. MY IAC valve is my biggest problem lately, i cant find one for sale on the internet anywhere for the 02 lancer, everything specifically says 2003 lancers, im scared it won't fit.

 

yeah, definitely check with the seller first, if they can't give you a definite answer, it's most likely garbage.

Just dealing with an ebay CAI and it said it was compatible with all models of the 2003 OZ, but they lied....not for automatic transmissions. So an hour job took me close to 4 to finally get it to work. Good times.