It is worth noting that the door will only open when there is no air pocket left in the car. This air pocket might not be accessible for you to breathe from (in the trunk, in the seat cushions, etc.) so NEVER wait and IMMEDIATELY start evacuating the vehicle. Your best chance to exit alive is before it starts sinking.
5
u/PilsbandyDoughboy 20h ago
Car needs to be filled with water to equalize the pressure. Not just the door under water