XSeries-forum

the other day i pulled up at some lights and i could smell rotten egg smell i was thinking it was the car in front of me but to day i smelt it gain deffo coming from my x5 can smell in in the cab anyone had this and what was causing it

Give us a clue is it a petrol or diesel, please put what. Variant your vehicle is in your signature please, this will help other members help you.
For example when a catalytic converter goes, you get the smell of sulphur, this gives off the odour of rotten eggs.
You can smell the car in front some times when in traffic if the cat has gone. If the smell follows you, it could be your car maybe.

car is 2006 x5 3L d was thinking on petrol cars had cats convertors

Diesels have Catalytic Converters up until the E70 when DPF's were introduced.  It's why the exhausts point at the road on diesel E53s and straight out on later models.

Richard

maybe a cats on the way out then wouldnt it throw a cel light on the dash tho

It might, but then again it's a BMW so the electronics might be broken........only kidding.

Not sure what brings a warning light on in those circumstances.  Is the car being used on short journeys?  That could be clogging the cat perhaps and a good thrash will blow the soot out.

Richard