I have a 2006 Nissan Sentra and replaced both front rotors n brake pads not less than 6mo. Ago. My passenger side was making grinding noise so I took a look at my brakes cause it sounded like metal on metal. When I took my brakes off seen they were gone n my rotor looked worn yet on the drivers side both looked fine. Can you tell me what can cause this?
I've seen this happen when the pads aren't aligned properly, sometimes from a missing shim or retaining spring. Basically the pad and rotor are in constant low grade contact and things wear really quickly as a result.
It's possible that you have a caliper that is stuck or simply not working or a bubble in the brake line/fluid. Bleed the brake line. If the fluid is brown, keep bleeding until it runs clear. If you see bubbles (or the fluid stops coming out for a few seconds) wait until you see all the normal brake fluid come out.
Don't forget to add more brake fluid (and try not let the line run dry, or else you will have to keep bleeding the line until you get those bubbles out).
Tip: I usually push a 3/8" clear vinyl tube over the bleeder screw so that I can better oberve the color of the fluid and see bubbles in the tubing as I bleed the brake line.
If one brake line has brown brake fluid it is getting over heated, probably due to a bad caliper. Bubbles may indicate over heating or a bad caliper as well but then again, maybe not. The brake line itself may be to blame, or there may be a small leak somewhere. Since brake fluid is corrosive to metal, look for any unusually rusty (nissans are notoriously rusty, so look for extra rusty) joints/unions in the brake line.
I had simillar issue with brakes wear on driver side and passenger side still looks new on my 2003 Corolla. Calliper pins were ok as they slide back and forth freely. So check brake lines and no leaks I already new I had air bubbles in my brake line How to fix. Jack car on passenger side take out tire, open engine hood and locate brake fluid reservoir, open top cover just so air can escape through, now compress ur calipar piston, go in to car and pump your brakes so the piston moves out again, at this time start engine to release pressure from calipar piston. Note start car with transmission in neutral or parking position, now compress the piston one more time. Fit in your brake pad. once done , had someone depres brake pedal for you. Hold the rotor with both hands and try to rotate. Note rotor won't move with brakes depressed and will have a slight rotatory movement when brakes released. Fit your tire