Preheat your air fryer to 350ºF for at least 3 minutes, or according to your manufacturers instructions.
Add 2-4 tablespoons of water to the bottom of the air fryer basket. This will prevent smoke caused from the excess fat that falls to the bottom during the cook time.
Add the Italian sausages to the basket of your air fryer in a single layer, leaving some space around each of the sausages.
Cook for 10-12 minutes (or 12-14 minutes if using an oven-style air fryer), or until a minimum internal temperature of 155-165ºF has been reached in each of the sausages.
Flip the sausages halfway through cooking to ensure even browning and cooking.
Once the sausages are cooked through, remove them with a pair of tongs. Drain on paper towels to remove excess grease, and then serve immediately.