There is a pulsating on braking.
Bad rotors
No just the bad one.
You either have a bad brake caliper or the brake hose is bad.
could be bad rotors, or brake pads wearing unevenly, which would result in bad rotors.
have your brake rotors turned on a lathe, or replace them with new ones.
bad brake rotors or alignment shocks struts
NO. The rotors will rust overnight if the conditions are right. The rust will be removed the first time the brakes are applied. Yes if the rust has pitted them. Just have them turned on a brake lathe.
You possibly have warped brake rotors on the front. Or Bad Wheel Bearings.
Brake calipers are the hydraulic devices that wrap around the rotors and pinch the brake pads into the rotors when you stop.
This is not much information, but I'll give it a try. If the front brake rotors have too much run-out, "wider in some spots than others" then the rotors need refaced or replaced. If the problem is in the rear brakes, the brake drums are out-of-round and need resurfaced. If you feel the tremble in the brake pedal when you brake, then the problem is certainly in the brake system. ------------ He is correct...the rotors are probably warped. Replace the rotors if they are warped that bad. You can get them turned but they are going to be thinner than new rotors and whatever caused them to warp last time will happen faster. (heavy braking and riding your foot on the brake can cause the rotors to warp)
You can get your brake rotors replaced by visiting Autoparts Warehouse which contain various brake rotors in size and durability to fit your needs and accommodate your budget.