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01 v70 which engine hose? Has a leak

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01 v70 which engine hose? Has a leak

Post by CIK7 » Thu Mar 28, 2019 9:10 am

Hello so today I went out to get started on replacing the gear switch sensor (pnp?) because my reverse lights don't work. I was removing the air box when I noticed the metal hose going from the airbox to the exhaust. It has a few cracks in it which I think means it has a vacuum leak, right? I've been having issues with rough idling when starting the car after it sits there fore several hours. Can this hose be the issue with the idling? What is the name of the hose and what is the part number? I know it doesn't look like it's factory. BTW this is the NA version not the turbo. Pictures posted below with indicated hose circled for reference. Thank you!
2.4 hose 2.jpg
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Re: 01 v70 which engine hose? Has a leak

Post by abscate » Thu Mar 28, 2019 5:33 pm

It’s a warm air hose which helps keep the air temperature into the air cleaner constant.

It is not a source of vacuum leaks, it’s at ambient pressure at all times.

It’s condition is fine too, it can leak a bit without adverse effects, especially in temperate climates
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Re: 01 v70 which engine hose? Has a leak

Post by cn90 » Thu Mar 28, 2019 9:47 pm


For diagnosing air leak, do a smoke test.
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

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