from what i understand your downstream o2 sensors should last the life of the vehicle. should i wait to get a cel before i change my upstream or should i do it for the sake of tuning it up. the truck has 75k miles on it and it prob hasn't been changed

 

For optimum performance change the upstream sensors every 50K N.A., or 30K forced induction. The rears get replaced as they go bad. I did mine in about 10 min. with some PB Blaster and a regular open end wrench. Only use Bosch.

 

Where did you get the info about the rear 02? The rear 02 like the front is exposed to a lot of heat, maybe not as much, but still heat. It too is a electrical sensor that is subject to break down. If you have the financial ability to replace all 02 sensors after 75k I would.

 

read it off of another forum. i'm not able to change all of them right now at 50 a pop. would you say that my front sensors be priority over my rear?

 

I would go with the front ones too! Not trying to be hard about the info, just want to be informed and inform. Hey, how do you like the Edge and did it make a big on your truck?

 

i love it and am glad i purchased it. def would hate to have to go back to stock. btw your answer is a little confusing. i asked if i should put the front priority over the rear. did you mean you would go with the rear ones too?

 

I would just change the front 02s and wait for the check engine light on the rear . Thanks for the info on your truck, I'm looking at the Edge over some others.

 

i would go with the edge... just my personal opinion i've put alot of thought and spoke to quite a few people before purchasing mine. thanks for your help

 

I changed my ORIGINAL O2's at 170,000ish and it made absolutely NO difference on mileage. I wasted my money, and I suggest that you leave them in until you get a CEL for them.. And even then, if it's a back sensor, you don't have to change it.