Beware AEM AFR Sensor kits with Fake Failure prone Bosch Sensors

[zKars]

I have been bitten several times now (you'd think I'd learn...) by oxygen sensors that fail in the first few hours of life. 

I typically buy the AEM 30-4110 kit from Amazon, good price, shows up quick, blah blah. After a few rapid sensor failures, and me telling AEM, and them quickly sending new sensors under warrantee, and me going and buying "real"  (more real??) Bosch sensors, I now have some details to report so you can determine if you get similar "bad" sensors.