Preheat air fryer to 400 degrees for 2 minutes.
Brush the oil evenly over the corn to coat.
Place the corn in a single layer in the preheated air fryer.
Cook for 8-10 minutes, flipping halfway through cooking.
While the corn is cooking, add the sour cream, mayonnaise, cilantro, garlic, lime juice, and salt to a small bowl. Whisk well to combine.
When corn is finished cooking, immediately remove to a plate and brush liberally with the sour cream mixture.
Sprinkle with cotija cheese and chili powder before serving.
