ok well my throttle position sensor went bad so volkswagen said i need to buy a new one so i took my car outta the shop and ordered one, now can i just plug it in and go or do i have to go through the hassle of taking it back and having then mess with the ecu?

The TPS is built in to the Throttle body on our cars. You plug the harness to your throttle body and you shouldn't need to fiddle with the ECU