Came back from a road trip and puddle on the right side engine bay. Diff Seal Leak?

[Tooshay]

Came back from a weekend roadtrip and today I noticed a pretty sizeable puddle on the right side of the engine bay. Looking closer, it looks like the leak is coming from the diff shaft seal. It looks like the O-ring is dry and I can't tell if there are any leaks above it. I think I only see the exhaust headers?

This car was a recent purchase in April, and I had the dealer replace the front + rear diff fluid before delivering to me. Could all this fluid have suddenly leaked out of the shaft seal?

My only concern is that I thought diff fluid smelled terrible, but this didn't smell too bad. The liquid was slick and gold-ish.

Does anyone have any experience with this? I'm pretty sure it's that shaft seal but wanted to check with everyone here. I'm thinking it's Part #7 in this realoem diagram.

https://www.realoem.com/bmw/enUS/sho...diagId=31_0514

Pics of the leak below.

https://imgur.com/a/ljEdQex