Hoses and gaskets
I wish it were as simple as a belt.
All my vacuum hoses were either cracking or starting to crack, or petrified; so were the PCV gaskets and the throttle body gasket. The Florida heat doesn't help with the longevity of rubber.
I'm renewing everything above the intake gaskets, including the injectors.

Originally Posted by
mastermind
I have the EXACT same symptoms and it was simply my alternator belt which was snapped and not charging the battery.
Ramon
1994 540iA Nikasil EAT Chip
Tampa Bay, Florida USA