No I''m not sure it is installed correctly, almost no instructions, other then plug it in, no instructions as to how or where. I gave up and the BMW guy bailed my *** out, other wise, I think the car would have had to have been towed. I'm going to leave in in now that he got the car running again, until we get back from the Colorado Rally, then if it continues to be of no use return it and ask for a refund. I put it on a credit card, so I can can some help from them. Right now big waste of time and money. Yes I did a full Throttle reset, I do one almost every month. It was purchased from the sprint booster site list of vendors, I then it is the Mini Moris group vendor, and it is the correct number, for the crossfire. I bought it because of the lag, and getting cut off in traffic a lot, unless you keep the thing in 3rd gear, a pruis has more pick up because of the lag these things generate. This is just my openion, but every one had said they were so great, well I get a lot more grunt from doing throttle reset. Would I spend the money again absolutely not.