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Why Does Your 2019 Nissan Sentra Smell Like Rotten Eggs in Sammamish, WA?
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(Posted on Mar 16, 2019 at 12:00AM by Robert Bacon)

Dear Robert,

It sometimes smells like rotten eggs in my 2019 NissanÂ SentraÂ while Iâ€™m driving. I've heardÂ that this could beÂ down to an issue with the catalytic converter: what do you think?

Thanks,
Joe

Hi, Joe!

Although there are a few things which could cause your 2019 Nissan Sentra to start smelling like rotten eggs, the most common reason is a problem with the catalytic converter.

The compound which makes the rotten egg smell is called hydrogen sulfide. This is a product of the small amount of sulfur found in gasoline.

The catalytic converterâ€™s job is to transform the compound mentioned above into sulfur dioxide which is odorless.

When a catalytic converter breaks or its filters become blocked, it canâ€™t transform the sulfur into an odorless form. Although this is the most common cause, the smell of rotten eggs could be the result of an engine thatâ€™s running too hot or a problem with your carâ€™s fuel pressure regulator.

My advice is to call down to our Service Department and let the Technicians have a look at your Sentra.

Thanks for the question, Joe! Contact Kirkland Nissan, Washington again if you need anything else.