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      02-27-2017, 11:00 AM   #199
dmk08
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Originally Posted by Sleeper View Post
+1. This is the key point for warranty-worriers when it comes to flash vs. piggyback tunes (or tune vs. not).

With a flash, be it BM3, Hex, or one of the template tuners using the Euro-sourced file, if you flash back to your actual stock map or the dealership updates your DME, you'll get the 'DME tamper' code. You can flash back to a stock performance map using BM3 (not sure about VF) but any digging whatsoever on BMW's part will quickly put that little lie to bed.

Long story short, as soon as you unlock the DME and flash it, it's really game over for being able to flash to undetectable stock mode. That's just a risk you have to take if you want to jump in to the performance game.

On the piggyback front, I'm guessing it would take about 2% more effort on BMW's part to determine if there was a tune or not.

Based on that, if you're tuned, I wouldn't bother flashing back to stock or a stock performance map if taking your car in for service/warranty. The damage was already done.
Well.. if there really is a big tamper code that pops up after a flash where any general tech can see it I would say thats a lot easier than shipping the ECU/data off to BMW to find the JB4 traces. I do not believe any BMW dealer techs have the ability to get that deep into the ECU logs.
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      02-27-2017, 11:05 AM   #200
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Originally Posted by dmk08 View Post
Well.. if there really is a big tamper code that pops up after a flash where any general tech can see it I would say thats a lot easier than shipping the ECU/data off to BMW to find the JB4 traces. I do not believe any BMW dealer techs have the ability to get that deep into the ECU logs.


lol, are there still people out there that actually believe if you flash your car bmw can't tell? even if you flash back to stock?


lull
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      02-27-2017, 11:09 AM   #201
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Originally Posted by TrevorM3 View Post
lol, are there still people out there that actually believe if you flash your car bmw can't tell? even if you flash back to stock?


lull
I don't think anyone denies flashes are detectable now but the current thinking seems to be detecting a removed JB4 is just as easy. I really don't think so personally. (nor does my BMW Tech who is a good friend)
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      02-27-2017, 11:44 AM   #202
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There is no big heavy shipping of data. Its automated and detection is automated. Its the 21st century and there is internet. Piggybacks are just as detectable with FASTA reports. Inquire again with your tech. He should look into it.
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      02-27-2017, 11:46 AM   #203
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There is no big heavy shipping of data. Its automated and detection is automated. Its the 21st century and there is internet. Piggybacks are just as detectable with FASTA reports. Inquire again with your tech. He should look into it.
Sorry I dont agree man and Im doing BM3. Im just not going to put blinders on.

Last edited by dmk08; 02-27-2017 at 11:55 AM.
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      02-27-2017, 01:58 PM   #204
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Whatever it is you go with, you can choose to believe me or not or ask your tech to do a fasta report on your car and post it up on here for the sake of greater good.
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