Estimates? For the unexpected and unplanned for?
Yeepers, that'll be all over the place. I mean, a repair on a luxury vehicle tends to cost more than on an econobox, right? Used to be, domestics cost less to repair, imports more, but I think that line has blurred recently and it's no longer a good rule of thumb (the more units sold, the lower the cost of commonly replaced parts--more or less).
I think you also have to define repair versus maintenance. I've decided that, if it's not on the maintenance schedule, then it must be a repair. I understand that shocks/struts are a wear item. But so are bearings and windshields too. So where does one draw the line?
IMO, in terms of financial planning (which I think you are hinting at), one is well served by expecting the unexpected and holding a grand or so in repair money once any car passes the 5yr/100k mark. And once that money is used on a repair--that another $1k is put aside for the next repair, as the car is an inanimate object with many things hitting MTBF at the same rate. It doesn't have a will that forces it to be spiteful and break the next thing--but we've all heard stories about a vehicle needing one thing after another. Then, on top of that $1k repair fund, one is well advised to have cash elsewhere for other emergencies--which may need dipping into in case a kilobuck isn't enough--I almost think a grand might not be enough these days for a repair fund, appreciation and all being what it is.
And if I may go against my "if it's not on the schedule then it's a repair" tire and brake costs do not count towards that kilobuck. Those are routine and expected items that should be planned for, and far from unexpected. A sudden flat tire--that's a repair--needing 4 tires because they went bald--that's routine wear.
If I had to take a wild stab at unexpected (yet expected?) repair costs for the first 200k of a "normal" vehicle, ignoring brake pads and tires, I'd wager $2k. Struts and a windshield, maybe some wheel bearings.
On average most cars will need 2 of those 3 things, but not all 3. Just my pure shot in the dark. Maybe some other lower buck things to round it out--I'd pad my guess out to $3k but since I don't have money on the line I'll leave it at $2k.