36 mm (?) 12 point socket. Looong Breaker bar. Remove the staved part of the nut before you try to break it loose. Buy a new nut if it is not in the kit. KEEP EVERYTHING CLEAN once you get the old grease off and the new grease on before you fit the boot. Dirt is your enemy here.

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2022 X5 xDrive40i MSport
2021 X5 xDrive40i