Is the DSC Control Unit faulty?

Hi I have a 2002 Z3 3 ltr that has had water ingress in passenger footwell where the DSC sensors are
the signs were the DSC warning light and brake fluid warning lights permanently on.. After emptying
water and drying out and testing, the YAW sensor showed no output but the lateral acceleration
sensor was showing an output. The YAW sensor was replaced and diagnostic equipment to test DSC
carried out by independent BMW garage who say that the sensors appear to be OK and outputs are
getting to DSC unit (wiring continuity checked) but the diagnostics are not seeing these outputs at
the DSC control unit. Their assessment is that the DSC control unit is also at fault now. Would you also
think this was the case? Looking at wiring the inputs to DSC unit from sensors are to the "base" of
transistor and therefore putting either max 5v or 0v (as probably was the case) would not harm it.
What are your thoughts? Thanks