How often does a car need to be inspected?

It depends on the specific laws and regulations in each jurisdiction. In general, most countries and states require vehicles to undergo inspections at regular intervals. The frequency of inspection may vary, but it is typically done annually, semi-annually, or biennially. Some jurisdictions may also require additional inspections for certain types of vehicles or vehicles that have reached a certain age. It's important to check with the local Department of Motor Vehicles (DMV) or relevant transportation authority to determine the specific inspection requirements in your area.