What should a driver check if their exhaust system is faulty?

A driver should check vehicle noise and emissions levels if their exhaust system is faulty because these indicators provide direct feedback on the exhaust system's condition. A malfunctioning exhaust system can lead to increased noise levels, such as a loud rumbling or hissing, which signifies potential leaks or damage. Furthermore, faulty exhaust components may cause elevated emissions, including excessive smoke or fumes, which can signal issues such as catalytic converter failure or compromised seals.

Monitoring these factors is vital for both safety and environmental reasons, as a damaged exhaust system can impact engine performance and lead to increased air pollution. The other aspects such as engine oil, brakes, and transmission fluid, while important for overall vehicle maintenance, do not directly relate to the symptoms or issues caused by a faulty exhaust system.