http://auto.howstuffworks.com/auto-partsHow do you change front brake rotors on a 2003 Ford Focus?
take tires off calpers off then rotorsHow do you change front brake rotors on a 2003 Ford Focus?
once you have the tire off ,you will need to remove the brake caliper,then you should be ready to remove the rotor. You can get a repair manual from any auto parts store for around $30. bucks, there really handy to have.How do you change front brake rotors on a 2003 Ford Focus?
James got the basics but there is more to it and you also need special tools to open the calipers so the thicker rotors will fit and you will need the same tool when you replace the brake pads (which you might as well do if they're about due to be changed).