just bought an '88 325ic and the previous owner had meinike install brakes. Can the BMW brake sensors fit these pads? Also, I ordered the sensors and 1 has a metal pin protruding from a flat plastic plate while the other has 2 flat plastic plates. Why are these different and which one goes on the front? Lastly, the overhead check light panel has the brake light check light lit even though all my brake lights work. Any way to diagnose this, could it be a bad relay? Thanks, Kelly