I replaced the shocks on my 1986 635 csi, and now the ABS warning light comes on as the car goes over 10mph. I suspect the sensor(s) are damaged - I need a pair of ABS sensors - BMW part no. 34 52 1 179 981 - now discontinued or BOSCH part no. W0133-160-62-49 Keen to get any thoughts on how to get them.... Thanks