I don't understand. I sent everything just as it states and i got an e-mail back stating that my serial# was invalid. i have had hptuners for about 4 years now since 1.7v and i have ordered VCM Enhancements for lots of cars i have tuned including other years as well. can someone explain this to me. Hptuners told me sorry for the inconvenience, your payment will be refunded back to you. I DONT WANT MY MINEY BACK!!! I WANT THE SD TUNE.