Bad Smell

When my wife drove her 2003 325ci in the garage yesterday, it made the whole garage smell like something had died -- maybe a little like a natural gas leak. It didn't smell under the hood. I checked for road kill. Any ideas?

Think about it...Did it smell like rotting eggs??? or, as I call it stinking sulfide gas..If so the computer system is not working... and the First place to start is the OX sensor. Hope this helps. Later Mark

I agree . . . .