The exhaust pipe plays a key role in diverting exhaust fumes out of your engine, which in turn keeps your vehicle running smoothly. Built-up exhaust fumes can ultimately cause engine deterioration, which makes it important to have your exhaust pipe regularly inspected. If you notice your regular fill-ups aren’t getting you as far as they used to, bring in your car for an inspection. As with vibrations, loss of fuel efficiency might be a sign of a car exhaust system problem. Exhaust leaks makes your motor work harder, which requires more gas.