The 2004 Mazda 3 came standard with two-wheel anti-lock brakes. Four-wheel anti-lock brakes were an option for the 2004 Mazda 3. The rear calipers in the Mazda 3 have rotating pistons, which require rotation while compressing the piston. The tools needed for this project are available at most auto parts stores.
Install a caliper compression tool on the end of a ratchet extension. Use a 3/8-ratchet and extension for this process.
Align the points on the compression tool with the brake caliper piston.
Rotate the ratchet clockwise or counterclockwise, depending on which side of the vehicle you are on, while simultaneously applying pressure onto the caliper piston. Mazda rear calipers rotate in opposite directions on either side of the vehicle. When compressing the driver's side rear caliper, you are going to turn clockwise. When compressing the passenger side rear caliper you are going to turn the ratchet and tool counterclockwise. Turning the caliper piston while applying pressure will cause the caliper piston to retract into the caliper.
