Not sure about these v8s and alternator brackets, but, when I first picked up my x, it was leaking profusely from the oil pan and both of those little o-rings. It was hard to tell for certain if it was the o-rings or just the pan. The gear oil and engine oil were all mixed together.

I did the axles back in January. I had a fit getting the passenger one in, and messed up the seal. The axle seals weren't leaking but because I'm an idiot now the one was. So I ran the front diff leaking for about a month, it got low and fluid and started getting noisy. So now I've addressed that but I'm probably going to have to rebuild the diff.

Crack the fill plug of your diff. And if nothing comes out you probably want to replace those things soon. If you keep running it with a leak what's going to happen...

When you put the axles in you cannot touch the seal at all. If you put the opening in the c-clip at 12:00 it will push right in first try, very satisfying.

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'05 E53 3.0 6mt
'17 F30 340ix 6mt
'96 E36 328is, in progress