Valve covers on the Nissan / Infiniti VQ35 engines are prone to leaking oil. Often times the covers leak at the gasket and you will notice oil on the edges surrounding the valve cover. Usually, replacing the valve cover gaskets will cure this issue. You should ALWAYS replace the gaskets any time you remove and re-install or install a new valve cover. Genuine NISSAN / INFINITI part
Fits ALL INFINITI G35 2003-07 2dr coupe All Infiniti G35 2003-06 4dr sedan (also known as V35 Skyline 350GT overseas)
Fits all Nissan 350Z 2003-08 (Fairlady Z33 overseas)