it was a fluke that the BMW sensor was within reason the same size to fit in a Sierra Hub Stevie

i bought the whole system out of a working car for 300 euro which included

servo and master cylinder with 2 pressure sensors
abs block with plug
yaw sensor
brake switch
4 sensors

you can use the blue sensors for speedo supply as well as traction control and DSC and are active sensor with a processor in the ABS sensor itself

i didn't want to try to set it all up to realize the sensor wouldn't read 96 tooth ab ring .bmw used to run the 96tooth on their old e30 m3 /m5 but changed up on the later model to 48 tooth.i just assume it is an upgrade now

i can buy 4 original bosch sensors for the price of one Cossie one by the time I import it into Ireland etc.

im no expert in any of this but i want to try something where parts are readily available stevie