Away on a trip and the dreaded ABS warning light comes on and will not go off , then the speedo ceases to work and the indicators will not self cancel and I lose the neutral light , ride another 200 km to our hotel and to be honest I'm expecting the worst , connect up the GS911 and run the auto scan , it tells me rear abs speed sensor is not operating , what a relief so on to Bangkok and into BMW they fit a new speed sensor in 1 hour and recalibrate everything , may I add using my Gs 911 , everything as good as new and working perfectly . The reason I am posting this is simply because the GS 911 saved me a big mind f--k and I didn't have to cancel my trip , as with out it I would have believed the ABS unit would have needed replacing and great cost as we all know and my trip would have had to have been curtailed . Worth it's wait in gold , I am a very happy man .