Originally Posted by Will@PRS
As said above, most tunes now have reversible flashes. VF Engineering just released their NA tune for the E9X M3 that has reversible flash and fault code reader.
Wouldn't the read/write counts be off though? Meaning, wouldn't BMW see that more writes were done to the software than what they had documented during services showing evidence of a tune?
I would really like to run a tune on the car, the only thing holding me back is the possible warranty issue.