Quote:
Originally Posted by scotchy
I'm pretty sure even though it is removable, if you have a problem with the motor and they dig into it, they'll find the logs showing repeated requests for boost that exceeds factory parameters, so they'll know something was there.
Personally I've had tunes years ago but haven't on the last few cars. Like was said earlier, if I do I'm assuming my warranty is void and while unlikely, don't want that risk.
I read an article the other day on the X5 (not sure if it was a specific engine/model only) that said the transmission communicates with satellites and adjusts how it works/shifts based on knowing where you are/what street you're on etc. (REALLY??)
If they've this kind of capability, they can find a tune.
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You are correct. No matter if you use JB4, flash tune, or any other piggy back out there, it is detectable.
BMW DMEs for the last 8-10 years store FASTA data which will show every aspect of the car to anyone looking. This is true of a flash tune or a piggy back. The FASTA will not be inspected at dealership level, only if a PUMA case is opened in review of a considerable warranty claim.
Bottom line, if you're going to mod then you need to go in with the frame of mind that your warranty is pretty much out the window if you break something major.
Flash tuning is better since it manipulates everything at the firmware level giving you better and safer performance, and can be flashed back to stock in a few seconds with your own laptop. A piggy back requires you to unhook all the stuff under the hood and if you have anything going through the firewall can be a real pain in the ass.
ALL will be detectable if you break something major, regardless of what folks on the forums will tell you. Only Dinan keeps the manufacturers warranty, but that will cost more than all the options out there and not give you as much of a performance boost. I also don't think any Dinan tunes are available yet for the G05. I asked my dealership and they never got back to me so I used Mission's flash tune. I've had the tune for a few weeks now and absolutely love it! I just hope they come out with the ZF 8HP5x EGS flashing tune soon for our vehicles.
Do a ton of research, forum searches, google searches, and find what's right for you. About 25% of my searches came up with some poster named 'Mike' who's a hardcore JB4 fanboy though, so take any posts you see from him with a grain of salt. He's a JB4 resale guy if that tells you anything.