I've had this rotten egg smell problem from when the car was purchased new. Sadly, after three attempts from Toyota service to try and fix or solve this issue they have failed. I've been told to try different fuel types, I've done this but again the rotten egg smell prevails. My main concern is how does the smell enter the cabin when all windows are up and A/C is on recirculate? So, rather than be concerned with a faulty catalytic converter as another poster might have suggested, shouldn't we be more concerned with the seals of the car? After some research on the net it seems like a rather common problem, perhaps Toyota night consider a recall to resolve this issue once and for all.
