Folding mirror repair (switch pin)
 

My driver side mirror doesn't stay folded so while I was trying to see what's causing it, I broke off the wire in the tiny pin switch (attached photo). I'm going to try soldering it back but looks too difficult.
Would it be possible to purchase this part without having to buy the entire mirror unit?

I hate to say but you have to source a used one... BMW does not sell just that part, they sell the entire power mirror harness.

PS: keep that metal tang. you neve rknow when you may loose one. Always good to haev a spare

I've seen them on eBay UK. Give it a try...

An example. No endorsement...

BMW X5 E53 Folding Electric Side Mirror Sensor Microswitch New Fix And Repair | eBay

I have the same problem with my mirrors. My driver's mirror will fold and immediately go back to its normal position. I was unsure if you determined that the micro switch was the problem or simply a causality of your troubleshooting. Did you fix the problem?

The problem is just ficsator

For some time u can resolve ptoblem by your hand...just oush mirror forward and back in normal position and then press button shoukd work! If not...just replace ficsator... but u already broke something there :D

Is there another word for "fiscator"? I don't know what that is. Thanks for your response.

The thing or switch who fixes the mirror.. do not know in english... one of the rrason is that thing! U can listen when u fold the mirror by the hands! My was gone some where in wrong position!

Thanks. That's quite expensive.

BTW, what exactly does this switch do? Mine is completely disconnected but the mirror still folds, just doesn't stay folded. I'm thinking this switch wasn't the problem from the beginning and I I should not have even touched it.