To find the correct amount, you must consult your vehicle's owner's manual. The information will be in the section covering the air conditioning system. Alternatively, you can look for a sticker under the hood, often near the radiator or on the AC components themselves. This sticker may list the refrigerant type and amount.
Do not attempt to guess the refrigerant capacity. Using too much or too little refrigerant can severely damage your AC system. If you cannot find the information, consult a qualified automotive AC technician. They have the tools and knowledge to properly service your system and determine the correct refrigerant charge.
