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Discussion Starter · #1 · (Edited)
I have a 330i 2004. It started to idle rough, but not at higher rpms. I found a hole/crack in the hose that runs from the air filter box to the throttle body--what is that assembly called? Do I need to get the entire assembly?

I think it is called the throttle body to plastic coupling piece. It is just before the main hose from the air filter enters throttle body and there is another hose that splits from it--I believe that is to control the idle

Is it?

Intake Bellows - Throttle Body to Plastic Coupling
Mass Air Flow Sensor Boot

They look the same to me
 

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Discussion Starter · #3 ·
Thanks

Thanks for your help. The part number was for the dealer? I saw them on line they cost about 15 dollars
 

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