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What is the plastic button on the seatbelt for?

Model: (Various brands) Various
Part: Checks and maintenance

Video tutorial

Have we ever wondered what the plastic button on the seatbelt is for? If you answered "nothing," you're mistaken: companies don't put 0.01 cents worth of plastic on a seatbelt if it serves no purpose, you can be sure of that; and it's not just a simple closure button as it might seem.

In fact, it has a function, or rather, it has two. First of all, it prevents the metal buckle from sliding outward on the belt itself; additionally, it also helps keep the belt in place while we are fastening it.


Posted on 27 December 2025 by ScegliAuto


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