the hinges use a cup and socket system , and do wear, but are very easy to replace ,
you can undo the bottom screw, then undo the top bolt, this takes out the securing pin, the actual door doesnt pivot on this, but the top hinge section has a pivot point on that sits over a matching cup on the bottom part ,
with both the hinge pins removed, ( and the electrics) the door simply lifts off the two body sections, and fitting is exactly the same,
with regard to wear, open the door , take a firm hold of the latch end and try and lift upwards, if there is wear you will be able to lift the door a few mm's , if no wear can be felt, then o would investigate the striker , as long as the door sits correctly once shut
BB
i do have some spare hinges if required, pm me if needed
