This video demonstrates one way to do a front differential oil change on a 2020 BMW X3M Competition.
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14mm hex - https://amzn.to/4e1TbrO
Drain Plug O-ring size is - 1.5mm x 22.5mm ID
Oil Extractor Pump - https://amzn.to/4aurwNf
BMW Hypoid Axle Oil G5 - 83 22 2 471 487
Oil Drain Pans - https://amzn.to/4bUOf6x
Flexible Flat Funnel - https://amzn.to/3VhzEMR