On my car'* driver'* side belt, the button will not spring back. Tthe mechanism inside is broken, somehow. It'* difficult to get it to stick and stay latched, and to unlatch it you have to press down very hard on the button.
I took the seat out to the car to see if I could replace that section of the belt, it looked to me as though it was stamped onto the seat and I'd have to get a whole new seat (although now Deathrat tells me I can use a torx bit and it will come off...)
1992 Pontiac Bonneville SE, 163k miles - RIP (blew the transaxle)
1995 Honda Civic EX, 5psd