Originally Posted by 08LMB135i
He must be bullshitting you, parked my 135i outside all last winter where temps regularly range from +5 to -35 Celcius and never had any issues other than the slightly longer cranks when it was very cold.
Just because you didn't experience doesn't mean it doesn't happen. You are one out of thousands of these cars. There are a few service bulletins sent out regarding electrical systems in the past few months, so its possible you were just one of the lucky ones.