Quote:
Originally Posted by EuroKar
The fault codes will store individual readings from multiple vehicle sensors showing how the vehicle was being operated at the time of a fault.
The only valid way of BMW to tell wont be from a "piggy back".. ECU flash would be obvious by being able to read the date, mileage and how many times the module was flashed.
So realistically, unless it was an engine failure then I wouldn't really think they would put that much effort to look into all of this.
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I have an ECU flash on my x5m, told my SA what I did he in turn told the head M tech and before he hooks it up to the BMW System he deletes any data that might effect my coverage. The SA was able to show me one time how they know I manipulated the ECU but as far as BMW was concerned they would not detect it.
When I purchase a piggy unit for my M3 I want to have the same deal with acceptable amount of risk