Remove engine cover.
Remove ignition coil.
Remove spark plug using spark plug wrench (commercial service tool).
CAUTION: Do not drop or shock it.
INSPECTION AFTER REMOVAL
Use the standard type spark plug for normal condition.
The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions such as: Frequent engine starts
Low ambient temperatures
The cold type spark plug is suitable when spark plug knock occurs with the standard type spark plug under conditions such as: Extended highway driving
Frequent high engine revolution
Gap (Nominal): 1.1 mm (0.043 inch)
CAUTION: Do not drop or shock spark plug.
Do not use wire brush for cleaning.
If plug tip is covered with carbon, spark plug cleaner may be used.
Cleaner air pressure: Less than 588 kPa (6 kg/cm2, 85 psi)
Cleaning time: Less than 20 seconds
Checking and adjusting plug gap is not required between change intervals.
Install in the reverse order of removal.
February, 2, 2012 AT 2:28 PM
Unfortunately, you missed the part about the rear bank of plugs. The Murano engine is transverse mounted, meaning the V of the engine is sideways when looking from the front.
In order to change the spark plugs in the Murano you need to remove the intake manifold as well. This includes disconnecting the throttle body and probably draining some coolant as well (most cars circulate engine coolant through the throttle body). Each of these bits require various gaskets.
This is one of those jobs that while you have it open, you may as well check everything else. Verify you have no oil leaks around your valve cover on the backside (common) and verify all your vacuum hoses show no signs of cracking.