GDA4

It is on top of the airbox and it has gotten brittle over the years. Should I replace it?

<img src="http://pictureposter.audiworld.com/12338/airbox-valve.jpg">

xr4tic

you can replace it if it makes you feel better, shouldn't be more than a couple bucks

Audi2ptzero

Looks to be a "check valve".

GDA4

Thanks!

AwdiA4

check my second to last pic in my pic poster. mine was cooked too.

::Relapse::

$20.99 if I remember correctly

Mat Indukts Lambos

just between the airbox &amp; passenger side shock tower area. $20 sounds right, at the dealer. It's job is to prevent any positive pressure from going back to the charcoal canister, can cause multiple confusing DTC's in the ECU.

This check valve is actually very common, and is located in 4-5 different spots on the AEB engine. Most common failure point is the airbox one for the evap system.

mtl expos RIP

your looks shriveled and nasty, ya you need to change it,,

kmbackid

i only spent $12 for 1

DaRealJSBomb

mine has a big hole in it. i put some tape over it as a temp solution. i plan on replacing it soon.