My experience with this was that Audi wanted $2k for a fix. They said the entire mirror had to be replaced and they didn’t seem to do much diagnostics work. An independent shop told me it was most likely a wiring issue before Audi had it. It seemed that Audi didn’t want to waste the time to do wiring, or perhaps that would’ve been more expensive. Anyway, independent shop replaced a small black box located somewhere in the door card, I believe this is the module you were referring to. That didn’t fix it. I ended up getting a part out replacement mirror for about $560. That wasn’t a 100% fix, as it apparently folded very very slowly. Had the independent shop that installed the mirror “clean” the wiring, and now it’s a good as new. For now.
Also, independent shop took mirror off, gave it power and verified it folded. This ruled out the mirror to me, and assured me it was wiring, but what do I know.
The box I’m referring to was about $40 used on eBay. I *think* this is the box I tried
https://rover.ebay.com/rover/0/0/0?m...2F143183855669 if not that exact one, it was something that looked just like it.
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