so i have been researching brakes for the GX, as i am coming close to needing a brake job on mine and this is what i found;
a lot of us have ether heard or experienced the sticking caliper issue(its a 120 problem -4runner and gx) and they typical way around this has been to just replace with new oe calipers or a caliper with a lifetime warranty. this is what i was going to do until i stumbled across this infor over on t4r.org. basically the guys over there are upgrading to the 5th gen calipers(150 platform) and not having issues, plus the pistions are bigger. everything bolts up and hooks up just fine, so i will be doing this when it comes time for new brakes. -ill probably go to NAPA and get their lifetime warranty calipers for a 2014 4runner.
as for rotors i have had issues with my EBC rotors i got for my 3rd gen 4runner. they were exceedingly noisy, and warped withing a year -come to find out i have a frozen caliper on the truck -i had done the tundra brake upgrade on it fwiw. anyhow i decided to go a different route with brake rotors, so i went to LC Engineering and ordered a set of their cross drilled and slotted tundra rotors for my 4runner and i have never looked back. they are quieter than the EBC(slotted and dimpled-i thought i was ordering drilled and slotted) and provide much better stopping power and fade resistance. so i called up LCE as i did not see a rotor on their web sight for a 5th gen 4runner and i wanted to ask what if any differences there are between the 4th and 5th gen 4runner rotors. the guy i talked to did not know but said he would find out and told me that they did infact have a different part number. got a call back in a bout 20min and he stated that the deck height to hat height was different, not by much but they were different, as well as outer diameter again not by much but the 5th gen rotors are slightly larger. and while the changes were not much -as people are successfully using 4th gen rotors with 5th gen calipers they could be risk of excessive wear on in side of pad or pistions than the other due to the deck height being slightly different thus not allowing the caliper to work evenly.
so when i do this upgrade i will be getting my front drilled and slotted rotors from
Premium Cross-Drilled & Slotted Brake Rotors -the same company that LCE gets all of their rotors from, for a 5th gen 4runner, and order my rears from LCE as they were very helpful and i have been doing business with them for over 10 years and never once had and issue with them.
so yeah just some food for thought on the brakes...