Originally Posted by GTEASER
Depending on your State, you may be required to have this service done in order for you to register your car this year. This was the case with my 2012 LGT when the WQC-39 came out. The State was notified because this was emissions related, and I would not have been able to register the car again in July if this had not been performed.
Ditto for Mass. My car is actually serviced in NH (not required) so I had to ask in order to get the ECU update. Figured I might as well anyway as I'm not tuned yet.