For starters i'm not heavy on the brake pedal, in fact, I tend to downshift using the paddle shifters (especially when i'm getting off the highway).
Now that I've cleared that up, lol, I've had nothing but issues with brakes on my 2014 Mazda 3 GT from the day i've owned this car.
I've had countless front pads replaced, rotors...the whole nine yards.
At 40K I was told that my rear pads were "low". At the time, all 4 rotors & front pads were being replaced under warranty so I decided to pay a few hundred and replace the rear pads.....so everything would be brand new...why not right?
Great, so, now at 77K and my rear pads are grinding like a mofo....metal to metal. How can this be? This is my 14th new car which i've owned and I've never had to replace brakes so fast like this...ever.... Its as if the front pads are doing nothing, (because there is like 60+ % left) and what I find strange is that the front rotors keep warping....you'd think it would be the rears at this point since they 'seem' to be doing more work.
Any other GT owners with this issue? There is absolutely no way I am paying to have them replaced (again).
Pay several hundred for new rear pads? It was all apart anyhow, so maybe $100 extra in parts and labor?
As for the rest, there a couple possibilities.
The front calipers may be sticking, causing the front brakes to get too hot and not work. This would be why the rears pads are gone so fast and why the rotors wear quickly.
Most warped rotors are not warped. When the brakes get hot, pad material transfers to the rotor. If the pads are hot and the wheel stops turning, a heavy patch of pad material may be deposited on the rotor. Several patches of varying thickness may be spread around the rotor, and you will feel these deposits as vibrations. These vibrations are usually attributed to warped rotors.
There may be a problem with the master cylinder causing the brakes not to release fully. This will also cause poor brake performance and short brake life.
The brake system should have some sort of proportioning valve. If the rear brakes are getting more pressure than the front, they will do more work, and since the rear pads are smaller they will wear out much faster.