How often do you change O2 sensors? Ive heard 75K is what recommmended by Toyota. My gas milage has come down very little. Im on top of tune ups when recommended.
O2 sensors
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You know i've wondered about this too, i've heard replace it at 30k, i've had cars with 100k on the original o2 sensor. If its bad, won't it throw a code and then you replace it? Do you really need to replace it when its not throwing a ses or a code?
I would and do it at 75,000 and after,and always OEM.
I put a Denso unit in the Civic at 180K, my mileage went up 3 MPG and it was 45.00 on Amazon.
Supposedly the older, unheated O2 sensors need to be changed about every 30K, but I put my last O2S (Bosch unheated single-wire) in my '89 at 196K. I just clicked over 250K the other day and the car is running like a top.
Note: I use TC-W3 as a UCL (512-640:1) in my Olds.
Note: I use TC-W3 as a UCL (512-640:1) in my Olds.
a rep. for denso gave a class i attended once, he said o2 sensors should be changed every 30 to 45k, even if you don't have a code. it will start becoming slower to respond and if it gives false readings but is still giving them the pcm will assume they are correct and adjust the fuel trim accordingly.
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Originally Posted By: spasm3
You know i've wondered about this too, i've heard replace it at 30k, i've had cars with 100k on the original o2 sensor. If its bad, won't it throw a code and then you replace it? Do you really need to replace it when its not throwing a ses or a code?
It's possible for an o2 sensor to be on the verge of failing where it hasn't thrown a code. You really need access to Mode $06 test results to see that.
You know i've wondered about this too, i've heard replace it at 30k, i've had cars with 100k on the original o2 sensor. If its bad, won't it throw a code and then you replace it? Do you really need to replace it when its not throwing a ses or a code?
It's possible for an o2 sensor to be on the verge of failing where it hasn't thrown a code. You really need access to Mode $06 test results to see that.
Originally Posted By: spasm3
You know i've wondered about this too, i've heard replace it at 30k, i've had cars with 100k on the original o2 sensor. If its bad, won't it throw a code and then you replace it? Do you really need to replace it when its not throwing a ses or a code?
Over time they get lazy and don't read correctly/accurately,so yes even if they don't through a code they should be replaced their a regular maintenance item too just like plugs.
You know i've wondered about this too, i've heard replace it at 30k, i've had cars with 100k on the original o2 sensor. If its bad, won't it throw a code and then you replace it? Do you really need to replace it when its not throwing a ses or a code?
Over time they get lazy and don't read correctly/accurately,so yes even if they don't through a code they should be replaced their a regular maintenance item too just like plugs.
Originally Posted By: Schmoe
My 02 Accord never had a 02 sensor replaced. Car ran like the day I bought it when I sold it.
Well it will,a O2 isn't a major engine management system as in the car will stop running if it goes bad, your mileage will suffer is the result.
My 02 Accord never had a 02 sensor replaced. Car ran like the day I bought it when I sold it.
Well it will,a O2 isn't a major engine management system as in the car will stop running if it goes bad, your mileage will suffer is the result.
Originally Posted By: citationxeleven
I put a Denso unit in the Civic at 180K, my mileage went up 3 MPG and it was 45.00 on Amazon.
it went up 3 miles to the gallon huh ? thats pretty impressive if thats the case. my daughter`s 02 Elantra had an 02 sensor slow to respond code the other day. cleared it,and so far it has not returned. i know it`s on it`s way out though.
I put a Denso unit in the Civic at 180K, my mileage went up 3 MPG and it was 45.00 on Amazon.
it went up 3 miles to the gallon huh ? thats pretty impressive if thats the case. my daughter`s 02 Elantra had an 02 sensor slow to respond code the other day. cleared it,and so far it has not returned. i know it`s on it`s way out though.
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I remember early VW models having a O2 light that came on at 30K intervals,it was mileage based only.
Today 100-120K seems reasonable, imagine a late model i.e. Infinity with wide band O2 sensors.
30k change 4 O2 sensors = $1k
60k change 4 O2 sensors = $1k
90k change 4 O2 sensors = $1k
100k change spark plugs.
This doesn't look right to me anyway.
Today 100-120K seems reasonable, imagine a late model i.e. Infinity with wide band O2 sensors.
30k change 4 O2 sensors = $1k
60k change 4 O2 sensors = $1k
90k change 4 O2 sensors = $1k
100k change spark plugs.
This doesn't look right to me anyway.
Old style first/second generation O2 sensors should be replaced at 30-60k.
New ones can go out is a day due to infant mortality, but normally go 100k or more, if the engine is running OK otherwise.
It would be smart to shop first, and have it ready for when you need it. Get a good one and the tools necessary.
New ones can go out is a day due to infant mortality, but normally go 100k or more, if the engine is running OK otherwise.
It would be smart to shop first, and have it ready for when you need it. Get a good one and the tools necessary.
I'm about to change out the original sensors on my 2000 Volvo V70XC with 142,000 miles. Wish I had done it more around 100K!
I usually go by the smog check result. If the smog check fail or is near the limit, or if my car is throwing a code, or if the gas mileage is very bad, I replace it.
So far they all last more than 150k miles.
So far they all last more than 150k miles.
Originally Posted By: spasm3
You know i've wondered about this too, i've heard replace it at 30k, i've had cars with 100k on the original o2 sensor. If its bad, won't it throw a code and then you replace it? Do you really need to replace it when its not throwing a ses or a code?
From my understanding the front O2 does not throw a CEL...just poor gas milage.
You know i've wondered about this too, i've heard replace it at 30k, i've had cars with 100k on the original o2 sensor. If its bad, won't it throw a code and then you replace it? Do you really need to replace it when its not throwing a ses or a code?
From my understanding the front O2 does not throw a CEL...just poor gas milage.
Thanks everyone. It looks like ill be ordering at least the front one now...even for the Jetta.
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