WARNING: This page is about a different car, the 2018 BMW 330i xDrive, 2018 BMW 330i, 2017 BMW 330i xDrive, and 2017 BMW 330i. However, it is still accessible from the selected car via links, so may be relevant.
33 10 REAR AXLE FINAL DRIVE 215LW - TECHNICAL DATA SPECIFICATIONS
Use only approved final drive oil: BMW Synthetic OSP/rear differential fluid SAF-XO.