How many miles do you have and still have a bad egg smell??? Has it gotten worse or better over time??? Was told it worse with lower mileage and should go away with time....I do not believe this statement but wanted some validation to my belifes...
It's related to the sulfur content of the fuel and a new catalyst used first in 2003 and newer cars that is less toxic for the assembly-line workers because they removed the nickel.I purchased my vibe with 22,000 on the clock. It still smells, but it seems totally depends upon the brand of gasoline.So, try a different brand of gasoline. It seems to be much worse with some brands than others. Offhand I can't recall which ones don't smell, (I'm thinking Shell) but Speedway brand in my area ALWAYS causes the smell = more sulfur in the gas.
My 2003 Vibe Base Auto 2-tone Salsa "SalsaWagon" was built in May 2002. I acquired it in Feb 2004/Traded it in on a 2016 Honda HR-V in Feb 2018.
I haven't been having the problem, but for me the side issue would be that if the exhaust smells bad, and you smell it in the car, then doesn't that mean that exhaust is getting in to the car? How is it getting in to the car?