Why Does the License Plate Fall Off When Driving Through Water?
2 Answers
When a vehicle drives through water, the front bumper pushes the water upward, creating an external force that impacts the license plate and bends it. When this force exceeds the maximum load capacity of the nut base, the nut is forcibly pulled out of the plastic, ultimately causing the front license plate to fall off. Reasons for license plate detachment: 1. Insufficient screws: The license plate is secured with only two screws, providing weak stability and making it prone to falling off. 2. Excessive speed: Driving too fast through water exerts strong impact forces on the license plate, leading to detachment. 3. Loose screws: Failure to inspect the vehicle over time can cause the license plate screws to loosen, making the plate more likely to fall off.
I've experienced this before. Last time I drove through a puddle during heavy rain, the next day I found my front license plate missing. When the water depth exceeds half the wheel hub height, the impact force generated by the water flow is particularly strong. The license plate is like a thin sheet of metal being pushed forward by water pressure. Many cars only use two plastic clips to secure the license plate, which can expand and loosen after being soaked. I've seen many car owners find their plates near the puddle afterwards. Now I reinforce mine with stainless steel screws, especially in southern regions with frequent rainy seasons. Vehicle height also matters - SUVs are more prone to losing plates than sedans.
