Drivers door soft close

[Derek29]

Came round to this job ive been putting off for ages.

Works now and again when I close the door, read up that its usually the micro switch that goes as I can make the soft close motor work by unplugging it and plugging it back in.

So I order a second hand one from Prestige breakers and its exactly the same. My concern now is, is there much point in getting another second hand one?

Seen one guy in the US cut one open and jam in a new micro switch, anyone else done this?