I had an intermittent error on my rear left wheel speed sensor causing ABS/TC errors. Bought a $20 unbranded replacement and my scanner reports 0kph on that wheel at all speeds. Figured lesson learned don't buy cheap so bought a $40 AIP branded sensor. Still 0kph at all speeds. So I replace with the faulty original and I'm back to intermittent random wheel speeds and 'short to another valve' errors. Figure it might be the ground wiring or something so swap front and back sensors. Now the errors move to the front, so I'm now certain it's the sensor. So now I have a genuine ATE part on order. Weirdly the original and 2 replacements are physically identical and even have identical electrical resistance. Are these cheap sensors really this crappy or did I just get unlucky?