Brian Eslick from How to Automotive http://www.howtoautomotive.com takes you step-by-step through the process of Replacing the serpentine belt on a 2005-2016 Nissan Xterra/Frontier with the 4.0L engine. Estimated repair time is .50 of a hour. You will need a 3/8 ratchet, 10 mm socket and a new belt.
How to Replace Spark Plugs on a 2005-2016 Nissan Xterra/Frontier with 4.0L Engine
Brian Eslick from How to Automotive http://www.howtoautomotive.com takes you step-by-step through the process of replacing spark plugs on a 2005-2016 Nissan Xterra/Frontier with the 4.0L engine. Estimated repair time is 1.80 hours. You will need spark plugs, throttle body gasket, upper intake manifold gasket, and optional ignition coil.