You get into your car, adjust the seat, and fasten your seatbelt. The headrest is there too, but most people rarely think about it. However, the two thin metal rods holding it in place are more important than they appear.

At first glance, the rods simply allow the headrest height to be adjusted. In reality, they do much more. They firmly connect the cushion to the seat frame and keep it stable during a rear-end collision. This stability helps support the head and limit sudden movements that could injure the neck. Such injuries are commonly known as “whiplash.” According to the National Highway Traffic Safety Administration, “a properly positioned headrest significantly reduces the risk of neck injuries in a moderate-speed rear-end collision.” Even a small adjustment can make a big difference.

During a rear-end crash, the body is pushed forward while the head often snaps backward and then forward again. Without a stable headrest, this motion becomes more severe. The metal rods are designed to handle strong forces and keep the headrest steady when it is needed most. The Insurance Institute for Highway Safety notes that “the quality and proper adjustment of headrests directly influence the level of protection offered to passengers.”

Many drivers make simple mistakes with headrests. Common problems include placing the headrest too low, leaving too much space between the head and the cushion, not locking the rods properly after adjustment, or reinstalling the headrest incorrectly after removing it. These small errors can greatly reduce protection.

Correct adjustment takes only a few seconds. Sit upright with your back against the seat. Raise the headrest so its top reaches the top of your head. Keep the back of your head about 2–4 cm from the cushion and make sure the rods are firmly locked.

These small metal rods show how modern car safety is designed to protect people quietly, even in the smallest details.