But have you ever noticed that small button near the top of the shoulder strap — where the belt meets the door frame?
It’s not broken.
It’s not loose.
And it’s definitely not just plastic.
That tiny button is actually a smart safety feature — one most drivers use without even knowing its name or purpose.
Let’s uncover what it really does — so you can use your seat belt more comfortably, safely, and confidently.
Because real innovation isn’t always flashy.
Sometimes, it’s hiding in plain sight — right by your shoulder.
What Is That Button Called?
It’s officially known as the Seat Belt Height Adjuster Release — but most people call it:
The seat belt slider button
The shoulder anchor release
Or simply “that thing that moves the belt up and down”
Located at the top of the shoulder harness (on the B-pillar, near the door)
✅ What It Actually Does
Pressing this button allows you to adjust the height of the seat belt’s upper anchor point — so the shoulder strap sits comfortably across your chest.
