As Grot13 said, that box collision is overlapping with the ground or even the car mesh and shows the widget.
This logic should be in the player, not in the car blueprint. It’s the player’s job to detect interactive elements around them. What you’re trying to accomplish should be done with interface - do look up how they work and what they offer before diving deeper into this kind of interaction.
Otherwise you’ll be redoing the whole thing very soon…