[A4] How much for a catalytic converter for my A4?

[Joyce Furono]

I live in San Francisco, so drastic temperatures changes places like
Colorado has don't happen here. And the car lives indoors. I pay extra for
privilidge.

I've decided to first ask my mechanic for the codes and ask if he's thought
about my 2nd oxygen sensor being the culprit rather than a bad cat
converter. Then I can leave it as is and have a much cheaper repair.  As
Peter said, if it was completely blocked then I would have power problems
all the time. That makes sense to me. As it is I have no problems when I'm
driving on flat land whatsoever. When my car hits 140,000 miles, I'll be
much more open to getting a replacement...

However it makes me feel a little better knowing that Audi charges an arm
and a leg for the cat converter. He generally tries to get genuine parts
unless asked otherwise. He didn't say it was broken, or that he could hear
anything rattling around in there. He specifically said it was blocked.

Thanks for all the thoughts!
Joyce