Measured tread depth, located the lowest tire, and rotated all 5 tires, putting the lowest on the swingout.
Also bled brakes while I was at it, good to get the old fluid out ever 4 or 5 years. It slowly gets contaminated with water and will boil more easily, and if it gets bad enough, can start rusting things internally. Which is not good.
This went well on the first 3 out of 4 brakes, until I got to the FR wheel (the one with the lowest tread, so I did it last). And the bleeder was *STUCK*. Yeah... I live in the salt belt, and it's a fight keeping the 4Runner from rusting away. A long, slow, losing battle.
Anyhow, I tried PBLaster, tapped on with a small hammer to help it penetrate, gently tried turning the bleeder in both directions (for some reason, going a *tiny* bit in the tighter direction often helps really stuck bolts). And... yeah, it broke off. So I decided to fuss with it a bit more, easy out in the hole, vice grips on the nub, wiggle, wiggle, yay, it broke free! Lol, JK, it did what usually happens when you resort to trying easy outs, the easy out breaks.
So FINE, I'll just not bleed that corner. But I wanted to make sure I hadn't managed to get that bleeder to leak, so after a very firm press on the pedal revealed no leaks, I went to put the wheel back on and discovered the brakes were dragging slightly. So in addition to a newly broken bleeder, it's sticky too? Two strikes is more than enough for a brake caliper. Ordered a new caliper. This has the 231mm Tundra brakes, I put them on maybe 8 or 9 years ago. No complaints, they were dirt cheap Rock Auto calipers to begin with.