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      05-10-2013, 08:34 PM   #4
falkman
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Drives: 2003 Z4 2.5i
Join Date: Oct 2011
Location: Fairfax, VA

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Quote:
Originally Posted by dharper View Post
Typically, that boot will dry-rot over time and needs to be replaced. It connects to the throttle body and then to the tube from the air-box with the MAF. I replaced mine a few years ago, and it was falling apart when I pulled it out. I had the same CEL and codes, which haven't come back after replacing that boot. You can get them for around $30 online. It's an easy fix.
Do you remember the part number or the name of the part (or even where you got it)? I'm failing to find it on these diagrams.

-Brandon
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