If you did a quick search, you would find that in 79,985 threads, involving 825,156 posts, from 64,386 members, the phrase "cas4" shows up exactly zero times. You can find references to cas3, which was an earlier version of the programming language used on the X5. But this isn't a typical service tool, posters here would use a GT1 for that.
So, this is not a tool that anyone here would ever use.
And at least some of us are wondering why you want to reset your odometer.
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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