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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Rough Idle and Rotten Egg Smell



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      03-19-2015, 01:15 AM   #23
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I had the same issue in my 08 335xi, the dealer needed to replace the Cats. They said that the cats were completely destroyed. (Rotten Egg Smell and Louder Exhaust)
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      03-19-2015, 09:29 AM   #24
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I had the same on a 2011 328, i had a coil fail, replaced and all is fine now
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      03-19-2015, 11:01 AM   #25
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I believe I've heard something before where a bad CAT will smell like eggs. I'm not 100% though.
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