I read in another post, someplace, the s/w upgrade is applied to all modules in the car. This includes the steering module, which has firmware to control the feel of the feedback. I read some of the 5 series guys had issues with pull and a software fix took care of them. On our X3s, there was one guy who claimed the s/w fix adjusted his steering pull. I've seen luke warm results.
I had a slight pull that they fixed at about 1200mi with an alignment adjustment, but it is still not 100%
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