Can a bad battery make your car smell?
Can a bad battery make your car smell? A Rotten-Egg Smell When You Pop Your Hood Leaking battery acid is one of the top signs a car battery is dying. A dying lead battery will produce hydrogen sulfide gas, which smells like something between rotten eggs, a sewer or well water. Why does my car smell like exhaust? Over time, the catalytic converter can become overheated, contaminated with gasoline in the exhaust or simply wear out. When this happens, you're likely to notice a rotten egg, sulphurous smell coming from the exhaust. You may even smell it in the cabin....