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Discussion Starter #1
It links like the plumbing of the S4's IAC would mate up in place of the S3 Auxilary air vale.

Has anyone tried this? Given how poorly the AAV tends to work and how expensive they are it seems like the S4 IAC might be a potential replacement.

Anyone know if the IAC electrical is just for a heating element?
 

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But Mad North-Northwest
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I don't believe that'll work. The IAC needs a signal from the Motronic ECU to adjust idle speed: I believe it's a square wave or something like that. The IAV just has a heater.
 
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