This is true. There are different tiers of OEM quality . I've encounted three distinct levels with several OEM brands.
O2 sensor question
- Thread starter arbetrader
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My O2 sensor went out around 100k iirc. I bought a pair of new sensors from CDan then (long time ago) and never got around to doing them. When I did the t-belt again at 200k I put them in. It never really made a significant difference in my range personally. Maybe ~10%ish. But anyhow, ran with it toasted for 100k and nothing worse to show for it. Engine's clean as a whistle and functions fine with the new O2 sensors in it.
I will also through this tidbit in. I've been told by my mechanic, who is also the service manager at the local Mr. T that they are seeing a pretty direct correlation to reduced longevity of O2 sensors with E10 gas. They actually have started taking gas samples with the sensors that went out really prematurely and all were actually closer to E15 blends... Hooray for corn!
Now the govt is trying to mandate E15, so I guess we will be getting E20! Oh, how I wish Land Cruisers with diesels were easier to come by in the states!
Here is the best guide on the subject that I have seen: Lexus LX470 (Toyota Landcruiser) Oxygen Sensor: Part 1 (Diagnosis)
2 hours to unscrew an O2 sensor? Who is this guy?