N
National Highway Traffic Safety Administration
Sometimes referred to as the "NHTSA." An agency of the United States government authorized to order manufacturers to recall and repair vehicles, or vehicle equipment, when investigations indicate that they contain serious safety defects in their design, construction or performance.
Natural gas engine
An internal combustion engine that burns natural gas.
Navigation interface
The means by which a vehicle's navigation system is controlled, including touch screen, jog dial, push button and/or voice activation.
Navigation system
A device that communicates with global positioning satellites to determine a vehicle's physical location and plot a course using stored map information.
NHTSA campaign ID number
The identification number assigned to a recall by the National Highway Traffic Safety Administration.
NHTSA item number
The identification number assigned to a technical service bulletin by the National Highway Traffic Safety Administration.
Nightvision
An exterior camera that uses infrared technology to provide added visibility when driving in the dark.
NLEV program
National low emission vehicle program. A voluntary national low emission vehicle program for light-duty vehicles and light-duty trucks that is enforced by the EPA (outside of California) once automakers and states opt in and the program is in effect.
NOx
An abbreviation for six chemical compounds produced during high temperature combustion, containing only nitrogen and oxygen atoms, that react with volatile organic compounds in the presence of sunlight to create photochemical smog.
Number of speeds
The number of different drive ratios a vehicle's transmission is capable of selecting.
NVH dampening
A system of devices that lessens the noise, vibration and harshness in the passenger compartment of a vehicle.