Here is some information from my research into vehicle inspection in NC and NH. I think this information throws light on a few points made in earlier posts in this thread.
First, I fully agree with earlier posts that when buying used vehicles, it is not prudent to depend just on the vehicle passing a state-mandated vehicle inspection. An inspection by an independent mechanic is recommended, and might even suffice in some cases.
When a vehicle is bought in one state for use in another state, completing an inspection defined by the first state can be helpful when the inspection-process is compatible with (super set of, if you are a stickler) the process in the second state. The thought is that passing an inspection in the first state can give the out-of-state buyer an idea of whether the vehicle might pass inspection in his/her state.
That said, here is a summary of what I found out about NC and NH inspections:
North Carolina: Administrative Code 19A 03D Section .0500 documents the Vehicle Inspection Guidance
http://www.ncdot.gov/download/dmv/CR...nforcement.pdf. The code addresses the following ten areas (the numbers in brackets denote the relevant paragraph in the code):
1. Brakes [.0532]
2. Lights [.0533]
3. Horn [.0534]
4. Steering mechanism [.0535]
5. Windshield wiper [.0536]
6. Directional signals [.0537]
7. Tires [.0538, .0539]
8. Rear view mirrors [.0540]
9. Exhaust emission controls [.0541, .0542, .0543]
10. Window tinting [.0551]
The NC code
does not cover body, chassis, fuel system, instruments (odometer, speedometer), on-board diagnostics, and defrost. Unsurprisingly it also does not cover rust.
The NC code explicitly defines emission standards (Carbon Monoxide and Hydrocarbon content in emission) without reference to EPA standards.
New Hampshire: Administrative Rule Saf-C 3200 relates to vehicle safety-and-emission inspection
Saf-C 3200. Saf-C 3203.01 lists 13 "primary areas" of inspection. Not enumerated in the rule (for some strange reason), but emission requirements are covered in Saf-C 3220.
1. Registration, plates, registration certificate and vehicle identification number [3210]
2. Steering, front end and suspension [3211.07]
3. Brakes, including parking brake [3212]
4. Odometer and speedometer [3213]
5. Electrical system, horn and defroster [3214]
6. Lights and reflectors, including headlight aim [3215, 3216]
7. Glass, glazing and mirrors [3217]
8. Wipers [3217.2]
9. Exhaust system [3218]
10. On-board diagnostics system [3222]
11. Body, chassis and bumper height [3221]
12. Fuel system [3219]
13. Tires and wheels [3211]
The NH rule references EPA standards related to OBD equipment, but it is silent on EPA emission standards. My three calls to NH DMV on this topic yielded no useful information, except that the person who might know about EPA emission standards is on leave. (Maybe this is how they got me off their back
) So, until I learn otherwise, I assume NH's emission standards are comparable to NC's (and probably not as demanding as CA's).
BTW, NH does not require emission test for cars with model year prior to 1996.
Opinion: For being the "Live Free or Die" state, the NH inspection process is quite extensive; definitely more involved than the NC process. (In case you are not familiar, NH does not require seat belts for people over 17; needs no proof of insurance in most cases; and motor-cycle riders don't need to wear helmets. You know, Live Free or Die.
)
On surface, the NC inspection requirements appear to be a sub-set of NH's requirements. In areas where NC and NH requirements overlap, it appears that a vehicle passing NC inspection in those areas is likely to also pass NH inspection in those areas. For example, NC requires at least 1/3rd travel left when brakes are fully applied; NH requires at least 1/5th. Thus, meeting NC needs for brake-pedal travel also meets NH's needs for brake-pedal travel. I assume the same applies to emission standards.
Because NC requirements are not as extensive as NH's, passing an NC inspection
does not provide much confidence about passing NH inspection (but it does help you spend some hard-earned money).