Re: Axle Nut.
I use a 4-foot Iron Pipe ($12 at Home Depot) with 1/2-inch breaker bar.
See photo of my 1998 528i.
If I do this again, I will use a jackstand to support the 1/2" extension so it does not sag down...
See the link below for tricks...
DIY: 1998 528i REAR Bearing the Easy Way! - Bimmerfest - BMW Forums