First thanks for the excellent information on the “Replacing Seat Belt on a 2007 +4” (or similar title) it was a great help. Turned out on my 2009 +4 that the bolt and nut are both 17mm although I didn’t discover that until it was out before that it had looked like the bolt was 18mm, even with modified spanners and a helpful neighbour with hands like a gynaecologist stopping the bolt from turning was a nightmare, we eventually stopped it turning by getting a large screwdriver in between the seatbelt base and mounting bracket from the bulkhead side and “lifting” the seatbelt to put pressure on the bolt to stop it turning, once removed it could be seen that the nut was Loctite’d on.
I would greatly appreciate any advice and recommendations on where to send the belt for refurbishment, thanks
Brian