Just common sense, when you turn R, the momentum of the car is going forward (basic Physics), it puts stress on the LF bearing. So if the LF bearing is bad, it will complain.

And vice versa...

Another reason to replace bearings in pair, unless you have very low mileage.

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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT