In the last 10k miles or so, I've been able to smell a rotten egg aroma more and more if I give it some gas. I'm not throwing any codes so, assuming this is from the cats, has anyone had to replace these before? I'm a huge DIY'er and upgraded my G37 cats with test pipes, that was a nightmare. If this car is anything similar, this is going to be quite a chore.

Also, I can only seem to find pretty pricey OEM versions. Do the IS350 cats fit? Do we have any decent aftermarket high flow options or reputable OEM rep options? If not, I'm contemplating just doing a trade in for a 4th gen now lol.

Thanks

 

Crap, could someone move this out of the build thread section??

 

I had the same issue I was going crazy so I tried the catalyst cleaner it cost me 25$ and after driving for 200 miles the code is gone and hasn’t came back in six months