I think if you mod your car or track it and then have problems, it's the price you pay. If you treat the car like a race car, then comes race car costs.
Just because an engine can have it's power output increased, then you have to live with the consequences.
BMW obviously scan these threads, to get a feel as what the customers are saying about their cars. Hopefully they take on board what's said and improve their vehicles, why shouldn't they have happier customers.
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