2004 volvo S40

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Jan 24, 2011 | 06:11 PM

lito1947

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Joined: Jan 2011

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2004 volvo S40

check engine light on and when running, whirring sound appears. One mechanic says breather box to be replaced. Please advise, Thanks a lot.

Jan 24, 2011 | 06:42 PM

Mad Matt

Senior Member

Joined: Dec 2009

Posts: 860

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From: Olympia, WA

Need a new PCV system (Breather Box is part of the PCV).
Lots of info about it on Swedespeed.

Jan 24, 2011 | 10:19 PM

AutoNaut

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Joined: Oct 2009

Posts: 750

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From: MD

Is your car a 2004.5 (newer body style)?
Stan

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