What is required during a vehicle safety inspection in North Carolina?

The requirement during a vehicle safety inspection in North Carolina includes checking essential components that ensure the safe operation of the vehicle on the road. This includes verifying that the brakes are functioning properly, lights are operational for visibility and signaling, and that the exhaust system is in good condition to minimize emissions and ensure compliance with environmental standards.

Other options may address certain aspects of vehicle maintenance, such as checking the horn or tire tread, but they do not cover the comprehensive scope of safety that a full inspection requires. Engine oil levels and fuel efficiency, while important for vehicle maintenance, are not part of the safety inspection criteria set by the state. Therefore, addressing brakes, lights, and the exhaust system encompasses the fundamental elements that contribute to the overall safety of the vehicle, making this the correct choice.