Engine exhaust is dangerous if inhaled. Engine exhaust fumes have many components which you can smell. They also contain carbon monoxide (CO), which is a colorless and odorless gas.
Carbon monoxide can cause unconsciousness and even death if inhaled.
Never start or let the engine run in an enclosed, unventilated area.
It is not recommended to sit in your car for prolonged periods with the engine on and the car not moving.
California Proposition 65
Engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
In addition, certain fluids contained in vehicles and certain products of component wear contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Hot Exhaust Pipes
Risk of burn injury when standing near or coming into contact with the exhaust pipe.
The exhaust pipe is hot when the vehicle is running and remains hot for some time after the vehicle is turned off.
To prevent injury, make a point of noting where your vehicle's exhaust pipe is, avoid placing your legs near the exhaust pipe, and closely supervise children around the vehicle when the exhaust pipe could be hot.
A hot exhaust pipe can cause serious burns.