New aux fan

[LinedDoor]

Hey, I had a little problem with A/C not blowing cool air when car was at lower speeds. ISTA showed aux fan error, so I decided to try an used oem aux fan from 2005year e53, the used fan turned on for a brief moment and didnt achieve full speed. Still had a aux fan error in ISTA, tried other used aux fan and still didnt work, so I refilled refridgerant, tought that it would solve the problem, but didn’t. So first I tought that theres some kind of electrical problem, but all the wires were fine and I didn’t find anything else. So I decided to try aftermarket aux fan, OEM was 500eur, bought NRF brand fan for 200eur, which worked perfectly. My only concerne is that behind fan there is electric panel(idk how to call it in english) and wire, which isnt hidden. I hope that the panel is waterproof and wont get harm when driving in rain and in snow. (See pictures below).

Anyone else used the same brand fan or any other? What are your experiences with aftermarket fans?

I have BMW e53 3.0d 160kw 2004