I have an 03 Camry as well...
I'll suppose you are starting with the car supported and the front wheels off...
Remove the brake caliper by removing the 2 bolts behind the rotor securing the caliper to the caliper bracket. Swing the caliper up and off of the rotor and secure out of the way...do NOT let the caliper hang by the brake hose.
The brake rotor should just slip straight out from the hub...if not use a hammer to tap around the outer edge to release the rust between the hub and the rotor...
The answer and dimensions are stamped in the stock brake rotor of your vehicle.
nb,
What is the minimum rotor thickness of the front and rear brake rotors on an '03 VW Jetta TDI?
The brake rotor thickness for your 2003 Mitsubishi Eclipse, is 0.75. The rotor should not be used if the thickness is less than this.
i need knows wtah size is rear and front brake discs.
The 2003 Toyota Camry has 41.6 in. of front leg room.
The 2003 Toyota Camry has 39.2 in. of front head room.
The 2003 Toyota Camry has 57.5 in. of front shoulder room.
The 2003 Toyota Camry has 54.4 in. of front hip room.
The front track of the 2003 Toyota Camry is 5 ft. 0.8 in. (60.8 in.).
Your front breaking pads are needed to be repalced, you might have to replace rotors.
It is important to maintain your brakes properly. The minimum brake rotor thickness for a 2003 Ford Ranger is 0.99 inches.