You can find them a varing prices at most parts vendors or out on the net.. Anywhere from close to 40.00 to upwards to 70-80.00.. You might try cleaning the old unit first and reinstall it and see if it corrects your problem.. Or if it's replaced and doesn't, you know whats it not.. With the engine idling, if the IAC is unplugged you should see the RPM drop off if its working.. It's about 4-5" long and 1.5 round or so..