What is the requirement for a vehicle's horn to pass inspection?

For a vehicle's horn to pass inspection, it must be audible and functional. This means that when the horn is activated, it needs to produce a sound that can be heard by others, ensuring it serves its primary purpose of alerting other drivers and pedestrians to the vehicle's presence. The key focus is on the horn's operational capability rather than meeting specific standards such as decibel levels or being of a certain type.

While other options may outline conditions that might be preferable, they do not pertain to the fundamental requirement for passing an inspection. For example, the requirement isn’t about the location of the horn or whether it's electric, but rather that it functions correctly and can be clearly heard. The inspection aims to ensure safety on the road, and a functioning horn is an essential feature for that reason.