That “Button” on Your Seat Belt may look like an insignificant piece of plastic, yet online posts often attach surprising explanations to it. Some call it a hidden emergency feature. Others claim drivers can use it to change how the restraint works. However, several completely different seat-belt components can look like a “button,” and each serves a specific purpose.
In many vehicles, people who mention a button near the shoulder are actually looking at the adjustable upper anchor on the B-pillar. Meanwhile, a tiny plastic piece attached directly to the belt webbing usually serves another purpose entirely.
Knowing the difference matters because a seat belt works as a carefully designed restraint system. Therefore, drivers and passengers should adjust only the features the vehicle manufacturer designed for adjustment and avoid modifications that could interfere with protection.
I once noticed a small plastic piece on a seat belt while cleaning the inside
