I am looking at buying a used 2006 A4 cab with 90,000 miles on it. The timing belt was replaced at 75,000 miles as a CPO, but the owner didn't replace anything else. Do these need to be replaced ASAP? If not, when should they be replaced?

It is a 3.0 V6 if that matters.

 

so for the life of the car, the other components have never been changed, only the timing belt? If so yes everything else should be replace with the timing belt. It is recommended and we have done quite a few 3.0L engine jobs for failed timing belts. Where are you located?

 

I am in Colorado.

The car had it's 5,000, 15k, 25k, 35, 45k, 55k, 65k, and 75k maint performed. The timing belt was changed at 75k, and the car now has close to 90k.

Do we bit the bullet and do the rest now, or wait a while?

It is my understanding that you do the other things along with the timing belt, to save on labor in case any of those fail, but the timing belt is the most important thing to get swapped out. But, being that the timing belt has already been swapped out, do we go back and do the rest??

 

Actually the belt is usually not what fails. It is usually one of the other timing components like the tensioner, idler roller, or water pump bearings. That failure causes the timing belt to break. Then your engine explodes (or near enough). I would assume that when the timing belt job was done those components were replaced but you know what they say about making assumptions.

 

Well, I just had mine done, and my invoice lists all the parts - did the PO give you maintenance records or just tell you what had been done? If you got the invoices, you could probably figure out what got done by carefully reading the one with the T-belt. It should list water pump, T-belt tensioner, probably accessory drive belt as well. If you didn't get the invoices, perhaps the PO still has them or would at least remember what was done if you were to contact them and ask.