Preheat the air fryer to 350°F (175°C) for 3 to 5 minutes.
Lightly spray the air fryer basket with cooking spray to prevent sticking.
Place the bratwurst sausages in a single layer in the basket, leaving space between each one.
Cook for 7 to 8 minutes, then carefully flip the sausages using tongs.
Continue cooking for another 6 to 8 minutes, or until evenly browned and fully cooked.
If using a thermometer, check that the internal temperature reaches 160°F (71°C).
Remove from the air fryer and let rest for 2 to 3 minutes before serving.