RX400h driver's mirror no longer folding

[Parrot of Doom]

Posting more for info really, but for months my driver's mirror has been complaining when I fold it in/out, sometimes working, sometimes not, always making a clicking mechanical sound.  Anyhow it's stopped working altogether, so I dismantled it to see what the issue is.  I'm fairly certain the servo that controls the mirror position is faulty, it's still receiving power (it's just a simple 2-wire connection) but only buzzes for half a second with no movement..  I suspect the gearing inside has stripped or come loose due to the high torques involved, but as it's a very well sealed unit that I'd have to destroy to break into, I'm going to try a Chinese replacement.  I'm certainly not paying salvage prices for a whole new mirror assembly.

https://www.aliexpress.com/item/32963740465.html  is what I'm going to try.

If you're trying to interpret the pictures below, the black metal semicircle is what the servo pushes against to rotate the mirror.  The servo is in my hand in the final two photos, the loom for the mirror goes straight up the middle and out the top, the servo power branches off that loom.