Rotors warp when they overheat. Perhaps you're riding the brakes, have a sticking caliper or are going downhill a lot and are overheating the brakes that way. Often pulling a trailer will overheat the brakes, especially if the trailer does not have electric brakes.
If none of the above seem to apply to your situation, perhaps someone put cheaper rotors on the vehicle; some of the import rotors look the same but they warp quite easily. Also not torquing the lug nuts correctly can warp the rotors. If the lug nuts are put on too tight the rotors will warp on some vehicles.
most common reason your car would jerk while on the brakes is that you have warped your rotors. your rotors are what the brake pads grab onto to stop your vehicle. they are made of steel, usually mid-grade, or in some cases low-grade steel. as the rotors heat up and are cooled rapidly they can become out of round. or if the rotors are starting to wear thin, they cannot dissipate heat as efficently as they should, they can warp at this time too. If you have warped rotors, they reak havok on your brake pads. you will have to replace all warped rotors and brake pads as a set.
Your rotors are warped. You will need to have the rotors turned or replaced and new brake pads installed. Warped rotors are caused by over tightening the lug nuts or by excess heat from high speed stops or riding the brake pedal.
warped brake rotors, have them resurfaced.
Rotors may be warped
warped rotors
when your brake pedal moves up and down when you press the pedal ,usually it is a warped brake rotor or a loose bearing on one or both brake rotors Warped front disk brake rotors.
Brake rotors are warped.
There can be. Only way to know is have your brakes and rotors inspected.
Brake vibration is usually caused by the brake rotors being warped. The rotors must be machined or replaced to correct the problem. if you can feel it in the steering then the drums are or rear rotor could be warped
warped rotors , brake
you most likely have warped brake rotors
Sounds like warped brake rotors .