[TNoldman]

I have never had to replace a Caliper on a vehicle I have owned under 150000 miles.
I find that many vehicles that are brought to fix are poorly or no maintenance until something is “grinding”. It is those vehicles that frequently need new Calipers.

[Paul R.]

Ok, I can go with that. (It’s a bit of a relief!)

In this case, the Explorer has under 75,000 miles on it & was garage kept all but last year. But I will check for any signs of corrosion or sticking of moving parts, of course.

The Toyota has over 148,000 miles on it, is 13 years old, has been kept outside all its life, and it appears the guys who put in the last pads did not do anything beyond putting in new pads, so a problem with a caliper there is less, uh, unsettling.

I really think this (Explorer) bolt problem is my lack of an air wrench, the oddly shallow bolt heads, and either some corrosion / no anti-seize in the threads or someone torqued in the bolts too enthusiastically, last time around.

Maybe it’s “all of the above”. (”All of the above” seems to happen a lot.)

Thanks again!