Quote:
Originally Posted by OneCleanBMW
It's not about dishonesty. It's about protecting their brand image for the 99.9% of people in the world that aren't on forums. In their eyes they've made the perfect product and they don't want anybody messing with that. Besides, you can't be dishonest these days, you could remove every mod, clear every log, all they have to do is check the max hp/tq/boost your car has run and if it's not within their parameters then you can say bye to your warranty. It takes minutes for them to interpret this data, at a dealership. This is why a good SA can save you tons of $$.
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It is also about safety and liability as well. The car is designed as a whole unit, and things like brakes, traction control, DSC, adaptive dampers, auto cruise control are designed and tested to run within certain parameters. Once people tune or change things, then there is potential to interfere. Especially when you don't really know for sure exactly what tuner is changing, and how that interacts with everything else. Lots of things are interlinked.
There is also a potential liability for them with emissions, if things are changed. They are very sensitive to that, think VW dieselgate etc.
It is pretty hard for them to stop you changing brands of tyres, brake pads, springs etc. However, they can stop you messing with the ECU.