Rotten Egg smell from exhaust

[Ski]

If it stinks, it means ur cats work.

Not had this issue for a good few yrs as I rip my cat off for better performance.

[dan_b]

Correct - if it stinks it means your cat is catalysing a reaction between some of the sulphur compounds and some of the water in your exhaust. There's nothing you can do about it save checking that your car is running correctly and to try a different brand of petrol which might have less sulphur in it

[scillyisles]

Mine sometimes does this even though I always run the car on Optimax - I tend to notice it when reversing the car into the garage. It's not consistent though so I guess some batches of Optimax must contain more sulphur than others.

[curlyks2]

Mine sometimes does this even though I always run the car on Optimax - I tend to notice it when reversing the car into the garage.

Snap - but only after a cold short slow run. A good blast getting everything properly hot and the only smell is warm rubber :mischeif:

Ck.

[Audi Parts Guru]

It's the Hydrogen Sulphide that's produced that smells like rotten eggs