My 2008 still has the factory brakes. I got it used in 2010 with 25k miles on it. I've put on quite a few since then. Up until Covid I was driving majority highway miles. Lately it's been more city driving. It's lived it whole lift in the Pacific Northwest. Lately I've been hearing a squeal that I thought was one of the brake pad wear indicators, but now that I've had a closer look, I'm not sure it is. I've only heard the squeal a couple of times and it's gone away quickly each time. I keep going back and forth between replacing front pads and rotors with Toyota OEM parts, just doing the pads, and not doing anything. It's a 13 year old car, for crying out loud. I plan to keep driving it for a long time, so why not invest a bit in new parts. Anyway, I've attached pictures for those interested. I don't know why I didn't get a total thickness on the right side; brain fart I guess. Sorry for the completely useless and otherwise lacking photos. Of course I zeroed out the calipers considering the nut thickness when I used it as a spacer.
Sigh. My new rotors looked worse than that 5000 miles after I installed them. Yeah salt. Posted via the PriusChat mobile app.
I realized I spelled brake wrong in the title but I don't seem to be able to edit the post now. Oh well, spelling is not my strong suit. I decided to keep the rotors as-is and replace the pads. The passenger side showed more wear. Both inner pads showed uneven wear. When I took everything apart I was surprised how easily everything came loose. The caliper pins broke free without neededing a second wrench on the inside nut. The calipers didn't appear to be frozen or caught up in the travel, but I suppose the proof is in the different wear measurements. On to the photos. This post is the front right (passenger side). The next post will be front left (driver side). FR old pads outer FR old pads inner FR old pads both FR outer old and new. Pretty even wear. FR outer thickness - 3.64mm of material remains FR inner old and new FR inner old uneven wear. Thin and uneven. FR inner thickness, thick end - 2.01mm of material remains FR inner thickness, thin end - 1.20mm of material remains. Yikes, I guess it was time to replace the pads! FR inner, close up FR inner, another close up FR new pads both FR new pads outer FR new pads inner
Front left (driver side) photos. Not as much wear on this side, but the inner also shows uneven wear. Sorry the order is a little different. FL old pads both FL old pads outer FL old pads inner FL inner old and new FL inner old uneven wear FL inner thickness thin end - 2.40mm of material remains FL inner thickness thick end - 2.92mm of material remains FL outer old and new FL outer thickness thick end- 4.46mm of material remains FL outer thickness thin end- 4.37mm of material remains. FL inner old uneven wear FL outer old even wear
I went around a few times trying to figure out how to deal with the brake fluid when pushing the pistons back in. I wanted to do a full brake fluid flush (and I still plan to), but I ended up opening the bleeder valves and letting the fluid escape the system. I used about 6 fl oz (half a bottle) of DOT3 to get the reservoir back to the full line. The waste fluid definitely has a brownish color. I guess 13 years of service will do that. When it was all done I noticed the brake pedal felt much firmer, but that has changed and it's back to the normal spongy it used to be. I haven't noticed the barking noises since completing the pad change. I've still got three and a half bottles of DOT3 fluid and plan to get around to the full flush after the heat wave dies down.
As long as the old brake pads moved freely in the bracket, and the caliper pins moved freely as well, then I wouldn't worry about the differences in pad thickness. See that sometimes- figure it's the inner pad running a little "hotter" (less ventilation) than the outer and just wears a bit quicker. Crickey, you call that old brake fluid? Nah, HERE'S old brake fluid. From a couple of old SUV's. On both of these pics I have a moderately bright LED flashlight shining from the back of the brake fluid - and you can't see it at all. Posted via the PriusChat mobile app.