As mentioned hard to tell for sure..other than the fluid sure doesn't look right...

Are you losing coolant ? We have seen the failure of the transmission cooler and coolant mixing with trans fluid...But when that happens it is usually a brighter pinkish milkshake color..

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'03 530i - manual swapped - 425k miles
'06 325Cic auto 115k
'05 X5 3.0 auto 158k
'99 E39 528i 5-speed 130k