Wideband O2 sensor: why are mine failing?

[mrbone]

So, I have an APSX Wideband O2 Air/Fuel gauge connected to my exhaust immediately aft of the header collector. Two bung's welded vertical and at a 45 degree. This is the fourth O2 sensor that has failed in as many months.
Anybody using the APSX brand gauge?
The first two that went bad- I attributed to china, but now I am not so sure.
Two failed on the vertical bung and now two on the 45 degree bung.
Bosch, Denso and Chi-com sensors have all failed.

Reached out to APSX but nothing..
I'm ready to install a different brand and see if that does the trick.
I know they fail from time to time, but this is nuts.

Many Thanks!!
Beep Beep

 

[moes]

excessive oil consumption, silicone from internal coolant leaks, using silicone sealant in the engine and some over-the-counter fuel additives can cause your O2 sensors to fail.

 

[zyzzyx]

And condensation can cause them to fail, hence the positioning if the bung. Lotsa things
make them go PooF as stated above!

 

[Hemirunner]

Thermal shock and leaded fuel will also do it. Using a heat sink style bung extender will help considerably.