Quote:
Originally Posted by Nikolov
They’re not modifying the ECU, they just feed it false info through the sensors, so it doesn’t trigger a CEL. Same as the JB4.
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We can change back to default any time and there is no mark of changing anything in ECU. There is no tunning just few clicks to get sound back. So this cant be reason to loose warranty.
Its every owner choice. You can have real M5 with pops and bangs or nothing.