When I bought my Yota 3 years ago her brakes sucked so I rebuilt them completely changing out everything except the booster because it still worked but, it failed last year so I put on a used one a friend gave me and again we have booster failure.
I'm doing the FJ master cylinder upgrade and putting on a new booster.
The rotors and calipers are getting changed next for the vented rotors also just not today.