ITM sensors not working!

I bought a set of sensors off Amazon for my z and they dont seem to work, has anyone else had this issue?

https://encrypted-tbn2.gstatic.com/i...1CGqwnNk_7imjA

I actually had a set of these on my z. They were horrible! they worked for a week or 2 and went bad. I ended up spending an arm and a leg buying OEM sensors.

We had a customer bring his Nissan Maxima in with a set he had for about 6 months,2 out of 4 failed. he ended up having to go OE and spent about $600 from the dealer on just the parts.

Thanks for the info guys, I'm going to see if I can return them.