Quote:
Originally Posted by Bimmer Pleaser
How is tuning a "small" mod? You are creating excessive heat at high RPM and exponentially increasing wear and tear.
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Exactly and BMW has for some time flagged cars and voided the powertrain warranty when tunes (or past evidence) of tunes were detected. With the current versions of ISTA, when they plug your car in to scan for faults, it will auto detect tunes and flag your car even if you flashed back to stock.
Totally legal, MMWR has nothing to do with that. Good luck calling your lawyers and spending more money than the car is worth, you will lose.
Aftermarket parts in the MMWR means you can go down to the local auto parts store and use a non-BMW oil filter, etc. Not fundamentally change the firmware of the engine management system.
BMW NA has violated the MMWR in other circumstances, specifically telling MINI owners they had to use MINI parts and MINI service centers:
https://www.ftc.gov/news-events/pres...-north-america