Thanks guys. I might get one of each since it looks like I need to replace two sensors. I measure the impedance on both rear ones and one had infinite (which it looks bad to me) and one had 480 ohms both directions which I though would not be good either, since it has a diode it supposed to be different impedance.
But what are the odds to get two speed sensors going bad in the same time. I read a good doc on e39 on how to test these sensors and to me both look bad based on that procedure.