Mine did similar before the tc gave up at 49,500 miles (phew) my Indy said make sure you get the tire pressures set to the door jamb before taking it in to the dealer even, as bmw can be ridiculous and say "you caused it" by letting it be off.
I'm not sure if that's true, but I wouldn't risk it. Put on stock tires, inflate to recommendations, then bring in. It's too expensive to fool around with.
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