Are you talking about that bright yellow tab with the red triangle and ! point? What does your owners manual say about it?
KOT
S**t I just looked again when I read your reply and at the very end of the belt restraint section it says this "
After a very minor collision, nothing may be necessary. But if the belts were stretched, as they would be if worn during a more severe crash, then you need new belts.
If you ever see a yellow label on the driver’s or the right front passenger’s safety belt buckle, that means to replace the buckle assembly. Be sure to do so. Then the new buckle assembly will be there to help protect you in a collision. "
So I'm Assuming at some point there was some kind of collision and the buckle wasn't replaced after said collision. Thanks KOT I had looked in manual but missed it the first time. Now need to get complete car proof records and see what kind of accident happened, what was damaged and repairs completed.