Why Does My Car Smell Like Rotten Eggs?

Are you wondering why your car smells like rotten eggs? While you can open the windows and break out the air freshener trees, a sulfur smell is a serious and unpleasant problem that requires a trip to the service center. That’s because that signature rotten egg smell is often associated with mechanical problems that could cause damage if unresolved. Our service team is here with some troubleshooting tips to help you understand your situation, and once you’ve gotten your bearings, be sure to schedule a service appointment at Robert Basil Buick GMC to get rid of the funk for good.

What Causes a Sulfur Smell in a Car?

When most Buffalo and Blasdell drivers talk about a rotten egg smell, they are referring to sulfur. The source of sulfur is hydrogen sulfide, which is found in gasoline. When everything operates as usual, you won’t notice any odors at all. It’s only when something is malfunctioning that the hydrogen sulfide makes itself known with that signature aroma.

What Car Components are Associated With Sulfuric Odors?

• Catalytic Converter: Your catalytic converter neutralizes the hydrogen sulfide compound, which means no odors. But if it becomes clogged with buildup, the catalytic converter cannot work properly and may release sulfur gas in the process.
• Fuel Pressure Sensor: The fuel pressure sensors help to regulate the amount of fuel in the engine. If the sensor isn’t working correctly, it may release too much oil into the engine. This can throw off the balance of your powertrain, causing sulfuric gasses to form.
• Head Gasket: The head gasket is a seal that prevents pressure from leaking outside the cylinders, but it can become damaged or corroded over time. This allows exhaust fumes to escape into your cooling system and circulate throughout your cabin.
• Transmission: Transmission fluid normally stays contained inside the engine, but if it’s not maintained properly, it can spread outside the engine. A transmission fluid leak can cause a sulfur smell.

Get Expert Car Care in West Seneca

Why does your car smell like rotten eggs? The team at Robert Basil Buick GMC can diagnose and solve the problem promptly. Contact us with your questions and schedule your service appointment at your convenience. While you’re here, check out our service and parts tips to learn even more.