I have a 2021 X3 and the pre-runner front bumper. I'm getting ready to buy the Axon 55-S winch and fully expect it to not fit. But, I do believe it will work with a few mods. More to come when I start installation.
The Axon 45s is larger than most winches. The top part of the cage on the winch seems to hit. We have tried to mount one on an X3 with a SATV winch mount and ended up using another winch. Let me know if you need some winch dimensions. I have some Axon winches in stock that I can measure.