Checking bulbs
With all doors closed, apply the parking brake and place the ignition switch in the ON position without starting the engine. The following lights will come on:

If equipped, the following lights come on briefly and then go off:

If any light fails to come on, it may indicate an open circuit in the electrical system.
Have the system repaired promptly.
See also:
Three-way catalyst
The three-way catalyst is an emission control
device installed in the exhaust system. Exhaust
gases in the three-way catalyst are burned at
high temperatures to help reduce pollutants.
WARNING: ...
New for 2009
An all-new offroad trim clones the Titan's PRO-4X badge; it replaces the
Nismo offroad package on the 2008 Frontier. Many of the features are the same,
including Bilstein high-pressure shock absor ...
Moisture
Accumulation of sand, dirt and water on the vehicle
body underside can accelerate corrosion.
Wet floor coverings will not dry completely inside
the vehicle and should be removed for drying to
avoi ...
