Diagnose brake problem. Booster? Jet pump?

[GAH111]

Would be nice if it was something as simple as a MAF. Any feed back on the brake booster. Do you suspect it has also gone bad? Since there are no cats shouldn't the 02 sensors read the same?

Thanks,
GH

[sapote]

Would be nice if it was something as simple as a MAF. Any feed back on the brake booster. Do you suspect it has also gone bad? Since there are no cats shouldn't the 02 sensors read the same?

Thanks,
GH

With zero data on O2 sensors, and a bad MAF (or its connection/wiring), I can't confirm the booster is leaking.

[GAH111]

I'll get another MAF but will this solve my brake booster problem.

G.H.

[sapote]

I'll get another MAF but will this solve my brake booster problem.

G.H.

Fixing a bad MAF has no effect on brake booster. If it does then BMW would have many lawsuits.