Wide band O2 replacement intervals

Starting to get a P0051 code regularly. Already checked the connections multiple times and even used dielectric grease in the connections. I have 167K on the truck and pretty sure its the factory sensors. How long do the O2 sensors last? I have been watching the live data with my Ultraguage and they seem balanced. I figured its time to replace them anyways. Any and all advice is helpful.

 

You've likely gone 50k more than many.

Seems like new would be a good gift for the ole gal.

 

That was my thinking. Found all of them on Rock auto for 400ish vs Napa 650 with my company discount. Im sure it would help with my MPG

 

I'd take the Bosch number and do some additional searching.

RockAuto is very good, but sometimes you can get lucky with other sources.

The P0051 is only for the heater circuit, so it's only out of spec during the warm up period, not really affecting performance, but cold emissions. So it's not a 'rush' repair. (that's why the Ultra shows a balanced dither rate)

I'd also only focus on the one that's misbehaving and let the others ride till they code out. But I'm frugal.

 

Im going back with Denso cause they are about the same price as Bosch. Rock auto was about the cheapest out there from my few hours of hunting online. I thought about replacing just the bad one but the previous owner didnt do that great of a job maintaining the truck. So I figured it would probably be best to do them all. I work out of my truck daily so if I can get a MPG or 2 out of it, Ill pay for itself quickly.

 

At 167k I would replace them, they are either shot or real close to it...