This is an OEM PCV Hose for the 2005-2015 Nissan Xterra.
The PCV Hose is also referred to as the Crankcase Breather Hose. The PCV hose often dry rots over time, and will eventually crack and cause a vacuum leak. It is a good idea to keep an eye on these hoses when doing regular maintainance.
Note: This PCV Hose is located at the front of the engine and it connects the driver and passenger valve covers together.
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