I have a Hyundai Elantra rental car for a few days. As I was exiting the car this morning, the headlights stayed on, and I noticed some light shining through the wheel well. Sure enough, it’s a functional vent that light, and presumably air, can flow through.
Who knew that a humble rental spec Hyundai Elantra with an actual key (how quaint) could have such an advanced aerodynamic device?!