Vacuum leaks

[Unregistered]

What are the most common sources of vacuum leaks in the BMW 535i engine?

[AllanS]

I had a bunch of cracks on the intake hoses that run from the air filter to the AFM, and from the AFM to the throttle body. I fixed it with JBWeld- not the most elegant solution, but it works and will hold me until I replace all that crap in the next month.