I have occasionally had the problem that the seatbelt buckles open by themselves. The lock just releases the buckle without any intervention.
Not funny while driving, especially if it happens to the kids. Only at the front seats though.
Has anyone ever had this ?
I have opened one, cleaned and oiled it but that didn't last long.
Is there a spring inside that weakens?
I guess replacing for a used one will not last long, any idea if they are still available new ?
It is a safety issue so should work reliably...

I've had it on mine but only the drivers seat belt as that is obviously the one that gets the most use. I changed the buckle for a used one that has obviously had less use than mine and it is fine. I've checked the part number and some suppliers are suggesting that the part number supersedes to the one for a 99 onwards car but it doesn't unless you change the belt too. The older belt will not click into the later buckle.

Have this also on mine, replaced the buckle with the one from my old 2.5 dt which did not have this problem (as far as I can remember), but it still happens.

th.

mine does this at times, i think its got sand in it and it needs blowing out with the compressor. i have had similar things happen with other vehicles and it's usually just crap in the slot, small coins are a good find.

That sounds convincing, many coins go down that way !
Guess I´ll dismantle one and clean it.
Otherwise I have seen aftermarket seatbelts with all certifications that are quite inexpensive.