Exhaust leaks are not uncommon exhaust system problems and can be caused by rusting and damage to parts. You may have an exhaust leak if you notice noises, smells, reduced fuel economy, or loss of power. If you ignore the signs of an exhaust leak, you run the risk of damaging engine components and polluting the environment. Most importantly, though, you could be exposed to toxic exhaust fumes in the cab of your vehicle. Because many of these emissions are odourless, overexposure to carbon monoxide - which can be deadly � is a possibility. All this to say, if you suspect an exhaust leak, get a mechanic to look at it ASAP!