Nsr door won't open

[PSimmo]

Hi
My nsr door wont open from the inside, will from the outside. MOT due soon so need to get it sorted. My mate mechanic managed to lube and work it free a couple of months ago but has now gone back to not working again. Booked in nxt thurs for diag, unless you can help so I can buy the part before I take it in.

Thx

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