Does anyone know who the oem manufacturer is for the rear abs sensor. I know on the first generation it was Siemens but I did a trailing arm swap and I was getting an abs light because the right rear sensor was bad but I tried a new Bosch one and an oem one and neither worked. So for now I put the one of my original R52 sensors in and it works fine. I ordered a couple used R56 sensors and both say Bosch on them. Was Bosch the manufacturer of the second generation sensors. Thanks for any help.