Why does your car smell like sulfur?

A sulfur smell in your car often indicates a problem with the catalytic converter, which is responsible for reducing harmful emissions. If it’s failing or clogged, it can produce a rotten egg odor due to the excess sulfur compounds in the exhaust. Additionally, a fuel leak or issues with the fuel system can also lead to sulfur smells. It's important to address this issue promptly, as it may signify serious mechanical problems.