Hey guys I'm new to this site annnnyywhoo I have a 03 g35 coupe 6mt w brembos so ig it's the sports package but anyways I wanna tune my car to go ****in brappapapaa buuuut I've been reading that I may have an ECU that's too old or sum sum so alls I wanna kno is how do I know of my Ecu is too old and/or if it is what are my options of swapping it what year is tunable and can swap into my car looking for hopefully something plug and play thanks in advance guys

 

Only you can tell if the ECM is the old one or not. Look at it and compare.

 

All 2003 G35 coupes are tuneable, however you (or the tuner) will have to repin the OBD2 port before it can be flashed.

Its the 2003 sedans that are 50/50