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I use both too and for sure there are faults like the tuner detect fault that was only visible in ISTA.
I assume BM3 only reads DMieE faults as that's all it seems to ever show?
Anyway, i don't trust it and as BMW dealers use ISTA i always rely on that for diagnostics.
Last edited by doughboy; 11-23-2019 at 02:16 AM..
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