You can buy just one.
The wheels were probably overtorqued. Have the rotors turned and the wheels torqued correctly. The mechanic more than likely overtightened the lug nuts holding your wheels on. With all of the horror stories of people having their wheels come off while riding down the road, service garages and mechanics are probably being over cautious. If tight is good, then even tighter is better. Unfortunately, what happens is that they end up warping the brake rotors (the disks that your break pads pinch together on to make your car stop). The warped rotors then give you that pulsing effect when you brake. Newer cars have lighter weight rotors that are more susceptible to warping, and, if your rotors are old or have been turned on a lathe, they are narrower and weaker and can warp easier.
NoT all StiiCkers Come WitH vAns..I owN manY pairs Of tHEm and SticKers don't come wiTh all Of TheM :)
Brake fluid in reservoir below acceptable level.
You need to adjust your brake light switch. It should be located on the brake pedal. Unplug the switch and loosen the nuts to adjust the button closer to the brake pedal.
Adjust the brake switch located on either the brake lever itself, or it will be attached underneath the dash. SOunds like your brake switch is off or broken. Look at the brake pedal and there is a switch around it that gets activated by you pushing the pedal - that is what needs to be adjusted or replaced. The brake light switch has probably come loose or broken. Look under the dash near the brake pedal arm. There is a switch attached to a bracket.
You can purchase one or more.
No. Brake rotors are sold individually specific to your make and model, but it is recommended that you always replace both sides at the same time.
Rotors may be warped
remove the brake caliper and the rotors come right off
No. Brake rotors don't have bearings, the wheel hub does.
Pairs they always come in pairs!
Yes they do.
Tap on the rotors with a hammer, after removing the tire and wheel and the brake assembly. The rotors will come loose. Slide the rotors off and reverse the process.
You will need to remove the front tire and wheels from your 2002 Jeep liberty. Remove the brake pads and break assembly. Tap the rotors with a hammer or mallet. The rotors will come off. Reverse the process to install the new rotors.
Brake rotor removal varies on different vehicle. You must first remove the caliper. Some brake rotors simply come off after this. Some rotors are fastened to the hub by screws. Some rotors are bolted to the hub, and the wheel bearings must be removed.
pairs!
May be its time to change your brake pads and rotors.