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Discussion Starter #1 (Edited)
Hi.

I have a 2002 9-5 2.3t 230hp, which has a intermittent, deep noise after turning the engine off.

I have tried to do a new AC service, and the sound dissapeared for a couple of days, and then started again.
It doesnt appear to happen when i have been driving without the AC on - but i'm not 100% sure.

Any good ideas?

It sounds like its coming from front, right corner... Near the airbox!
 

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I have the same groaning noise in my '01. I've been told it is the expansion valve in the AC system. I have not repaired mine yet and it has been doing it for over a year. It doesn't happen if I'm in the "econ" mode which also points to the AC system.
 
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