E82 / E87 / E88 / F20 1 Series (2008 - 2014)
I have a 2011 135i with a N55 engine. I recently replaced the valve cover due to the awful whistling noise at idle that seems to be common around here. So far the car has seemed okay, no noises and seems to idle okay. But I noticed a problem today:
When I drive now and I'm coming to a stop...