which hose is this? - United Bimmer Community

**tx328is** · 11-19-2007, 12:50 PM

Alright, after months of my idle getting progressively worse, I believe I pinpointed the problem. Vacuum leak. When I'm driving, I can hear a distinct hissing or sucking sound, almost as if its breathing. Anyhow,With the car idling, I sprayed carb cleaner on the area where I could hear the leak and sure enough, the idle surged. I couldn't get a clear enough picture of where I sprayed it, but I traced the hose and below is a picture where it ends up, It is the hose on the right that connects to the throttle body. Is this in fact a vacuum hose and if so, does anybody have the name or part number?

where it connects to the throttle body

and here is where it connects under the intake

**Numark318i** · 11-19-2007, 01:06 PM

check realoem.com for part number

**xsperf** · 11-19-2007, 08:08 PM

is that for the ICV? or is that the coolant overflow hose into the intake? not sure which one you are pointing to

**SHAHAB323IS** · 11-21-2007, 11:11 AM

i'm guessing its the electrical wire that plugs into the throttle position sensor in the throttle body

**TECH** · 12-03-2007, 11:00 PM

The hoses pictured are coolant hoses. There should be a hose on the bottom of the intake boot, which goes under the intake to the idle valve. I believe there is also a plastic fitting on the intake that likes to crack.