[22M340iAZ]

I had my car tuned now I’m back to stock for a full month but having a lot of errors, will bmw know it was tuned if I bring it in. It’s been a while since I been tuned

[Rdurty2]

Yes, they will know right when they scan your dme

[totalone]

Originally Posted by 22M340iAZ

I had my car tuned now I’m back to stock for a full month but having a lot of errors, will bmw know it was tuned if I bring it in. It’s been a while since I been tuned

Yes, once they scan, they will know

[22M340iAZ]

Originally Posted by Rdurty2

Yes, they will know right when they scan your dme

How long until they won’t know? Surely there is a limit to the logs

[Jnasratyar]

Originally Posted by 22M340iAZ

How long until they won’t know? Surely there is a limit to the logs

If you dme was femto unlocked, they will know the instant they plug into the ecu that it has been tampered with. Not sure how it works with bench unlocks though.

[totalone]

Originally Posted by 22M340iAZ

How long until they won’t know? Surely there is a limit to the logs

It's not based on logs they will know, but the contents of the ecu. You can drive 100k miles and they will still know this car has been tuned.

Some ecu have flash counter that you can't reset. That is another parameter they might look at. Pretty much they will always know at this point.

[MichaelNRW]

Your BMW has something called FASTA data that will be written in a sector of the ECUs where we don´t have access to.
This data will be downloaded everytime your car gets connected to ISTA at the dealer and then sent to BMW North America.
You can´t delete this data...

Even when you´re able to find a way around the tuning detection, BMW North America will know it and deny any warranty claims for your engine and near components.

The time of flash counters and other easy methods is over.
BMW can also see if you used a plug-in tune like JB4.
The car is logging a lot of values and once they´re over a threshold a message will be stored in the FASTA data.

[22M340iAZ]

Originally Posted by MichaelNRW

Your BMW has something called FASTA data that will be written in a sector of the ECUs where we don´t have access to.
This data will be downloaded everytime your car gets connected to ISTA at the dealer and then sent to BMW North America.
You can´t delete this data...

Even when you´re able to find a way around the tuning detection, BMW North America will know it and deny any warranty claims for your engine and near components.

The time of flash counters and other easy methods is over.
BMW can also see if you used a plug-in tune like JB4.
The car is logging a lot of values and once they´re over a threshold a message will be stored in the FASTA data.

Damn so I’m basically dead if something were to happen in the next weeks. These guys have really got me here 😅 okay so no dealership trips for me. Thank you guys so much

[MichaelNRW]

I don´t really care because the B58 is very reliable and any problem from the factory would´ve already damaged the engine.
Just don´t go over the top with a tune and stay around the safe limits depending on your hardware mods.
BMW will still do the regular maintenance and even carry on with service inclusive packages.

[xnick101]

Yes, the second they plug in they get a flag for possibly tuned DME. And there goes your warranty.