Where must the exhaust system exit in a vehicle?

The exhaust system must exit completely to the side or rear of the vehicle to ensure that harmful gases do not enter the passenger compartment and pose a health risk. Exhaust gases, which can include carbon monoxide and other toxic substances, are dangerous if inhaled, especially in enclosed spaces.

By directing the exhaust to the side or rear, it allows for better dispersion of these gases into the atmosphere, significantly reducing the likelihood of them re-entering the vehicle. This design also helps to minimize noise levels and enhances the overall safety and comfort of the occupants inside the vehicle.

Any other exit position, such as the front of the vehicle, underneath the floorboards, or into the passenger compartment would increase the risk of exhaust gas entering the cabin, leading to potential health hazards for the occupants.