January 26, 2026
Have you noticed a pungent, rotten egg smell coming from your car? Assuming you didn’t forget about a carton of eggs in your trunk, we’ll explain some common reasons why your car smells like rotten eggs below.
A Leaking Battery
The smell of rotten eggs is one of the most recognizable signs that your car battery is dying. When a battery gets old or damaged, it may leak battery acid, which is the source of the rotten smell.
Battery acid has a distinct, sulfuric odor, making the entire car smell like rotten eggs. If you open your car’s engine compartment…