2003 A6Q Avant Maintenance Costs

I was shocked and disappointed recently when I needed a new catalytic converter at a bit over 80K miles and the cost was something like $1100! My
'95 and '98 A6Q wagons both went over 140K miles without needing a catalytic converter. I am getting concerned about what it will cost to maintain this car.
I should get the timing belt changed soon. What will that cost? And since I needed one catalytic converter will I soon need to have the other one replaced and will it also cost around $1100? What other major expenses am I likely to encounter soon?
I've been buying used cars around two or three years old with low mileage so that they are still under the factory warranty for a while. Is there any source for what expected maintenance costs of such cars might be. When I replace my current Audi I will have to look for something which is less expensive to maintain.
Thanks, Bob
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Lots of sites like edmunds.com have expected maintenance costs, I believe. But these cars are expensive - to purchase and maintain. You need to do all of the preventative maintenance for sure on them. The timing belt and water pump cost about $900 to do on my A4 1.8T. More than a 'normal' car because the entire front end has to come off - bumper, radiator, etc.
As far as the second catcon going bad, who knows? Perhaps you had a bad one but I would think that would be covered by the emissions warranty, I believe they are required to cover them for 100k miles. You should check that. I also know that there are codes that are thrown that say catcon but are really O2 sensors. I hope you have a mechanic that you trust.
Dan D '04 A4 1.8Tq MT-6 Central NJ USA
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.