I have a 2003 g35 sedan im looking to get a reflash from technosquare, but im just looking for people have it already and can share some experiences. I wanted to know what kind of gains you got and if the difference in price between the Fspec and Lspec is worth it. Thanks

 

For the price of the Technosquare flash which is pretty much cookie cutter tune just like Cobb I would opt for Osiris which you can datalog and have Uprev send you a tune specific to your car

 

the 2003 sedans have had trouble because we none of those companies make tunes for our ecu. Ive been told its technosquare or no tune at all

 

AAM also does a similar "flash".

IMO, it's an old tech option, but it's one of the few opens for the early ECU G35. Are you sure you have the old ecu? You should call up your dealer, tell them your VIN and ask them for your ECU code. Then call up Uprev and figure out if yours is compatible.

 

Is the ecu different from the 2003 to 2003.5? Ill do that thanks for the suggestion

 

^^^ yes... only the early 03 wont accept Osiris... the connector is different - if you can get under the driver side console and see yours, I think there are pics (of the connector that does work) to compare it to - check UpRevs site (not positive they have pics there, but they might... look in the pdf manual too).

Or as previously stated you can determine by VIN