BMW X5 E70 transfer case and differential oils
How much and which oil goes into the X5 E70 transfer case and differentials?
The transfer case takes BMW oil 83220397244, 0.9 l. The front differential takes 0.65 l, with the level at the lower edge of the filler hole. The rear takes 1.2 l, and since there is no drain plug, the oil is sucked out. The plugs need new O-rings.
Which rear differential oil suits the X5 E70?
The recommendation is BMW OSP 75W-90 or equivalent, for example Castrol. Limited Slip 75W-140 oil also works, but it is not the factory fill, because the E70 does not have a limited-slip differential.
Does the transfer case oil change have to be reset in the car?
Yes. After the change, the oil change is reset with the diagnostic software, which zeroes the oil quality wear adaptation.
How do you change the transfer case oil when the old oil is black?
Change the oil twice in a row with the car raised, and if the oil is still dark, a third time. A change alone may not remove the transfer case noise completely if the case is already worn.