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.
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