That looks like a "Breather Hose" that crosses the engine from the AOS on the right rear to the PCV valve on the left front. It's a pain to replace because it crosses through the intake plenum. I have seen them 'successfully' repaired with a section of hose in the same diameter.
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I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
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