Answer: Technicians recommend that you have your exhaust system inspected every two to three years. However, it is important that you periodically check your exhaust system for any damage or signs of leaking. If you happen to find any damage or signs of leaking from the down pipe, you should have your vehicle’s down pipe replaced. Also, if you can smell your vehicle’s emissions, you may have a leak and should have your exhaust system inspected. Two more signs of a leak can be when your “check engine” light comes on and stays on or if your vehicle doesn’t have any power. If you encounter any of these problems, you should have your exhaust system inspected and have any worn parts replaced.