Graham. wrote:

In the majority of cases you don't even have to remove the cover to
replace the turntable motor.

I thought I remembered that sort of arrangement from a previous M/O
this one being built-in I haven't looked underneath it yet.

well, the built-in version has some extra ducting underneath and a
radiator panel behind the normal case, secured with self-tappers, so far
so good ...

.... except I'd inadvertently made life difficult for myself, when
fitting the under-cabinet lighting, I had managed to thread one cable
(with just 2" of slack) straight between the oven and its radiator panel
trapping it inside the cupboard!

at the bottom of most ovens there is a knock-out hatch that you remove
with a rat-tail file or similar. It has lugs so it can be re-fitted in
a different orientation

Yep, it's a common TYJ50-8A7 motor, I think I'll go with £6 from eBay,
rather than £45 one with a Neff sticker on it