View Single Post
      01-19-2013, 01:02 PM   #2
Blackhawk36
Lieutenant
Blackhawk36's Avatar
United_States
6
Rep
537
Posts

 
Drives: 2007 335i 6MT No iDrive
Join Date: May 2009
Location: MD

iTrader: (0)

The conditions you are describing, cold start in the morning, indicates a vacuum check valve problem. That is usually attached to the brake booster and easy to replace. I am out of town and can't check my vehicle til Monday. One fear is that BMW puts the check valve in the pump and it isn't serviceable by itself.