My car has begun to stall on cold starts. This doesn't happen every time, but often enough where I began recording each cold start until I captured it. There are two videos in the Imgur below, taken 2 days in a row. One is worse than the other, nearly stalling completely.
I'm not touching the accelerator at all during these videos - the car is overcompensating for the near stalls by winding up the engine, I think.
This is 2016 M235i with NO modifications to my car at all. All stock.
What could this be?
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