A car exhaust system can last anywhere from 5-7 years with regular maintenance. However, it may need to be replaced sooner if the vehicle is exposed to harsh driving conditions on a regular basis. Additionally, certain components of the exhaust system (such as catalytic converters and mufflers) will need to be replaced more frequently than others due to their high rate of wear and tear. It is important to have your vehicle’s exhaust system inspected regularly in order to keep it in good condition and prevent costly repairs or replacements down the line.