What type of bolt is the lower one that connects the rear heat shields (9 & 10 in diagram) together? I'm trying to understand why I can't just remove the passenger rear heat shield alone to access the vacuum pump screws? That seems to be the only bolt preventing that.
I can get an array of extensions and universal joints up there, but being by myself couldn't get a good connection and wasn't certain I had the correct (torx?) bit.
http://bmwfans.info/parts-catalog/E7...r_heat_shield/