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Old 07-05-2021, 06:19 PM #1
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dealer says I need two new air fuel sensors for $750
Is the AF sensors just another name for an O2 sensor? If not, where would they be located and how hard to change?

thanks
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Old 07-05-2021, 07:37 PM #2
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Quote:
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Is the AF sensors just another name for an O2 sensor? If not, where would they be located and how hard to change?

thanks
Rockauto.com , Denso sensor, about $110 each. Wrench is $10. 1000 videos to learn from on youtube
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Old 07-05-2021, 10:04 PM #3
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Quote:
Originally Posted by Richrd View Post
Is the AF sensors just another name for an O2 sensor? If not, where would they be located and how hard to change?



thanks
Yes it's a fancy name for O2. As said above rock auto has good priced denzo. I can confirm they are legit used denzo from rock auto a couple times on my evos. I've never changed one on a 4runner but it's pretty clean cut. I recommend spraying the sensors the night before with PB Blaster, stuff works like magic!

Also if there's room I highly recommend using the deep socket O2 sensor not the angles one with an opening. The one with the opening has stripped a few sensors for me!

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Old 07-05-2021, 11:05 PM #4
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Difference between Toyota AF sensors and O2 sensors:

All you need to know about Toyota Oxygen sensors and AF sensors - YouTube
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Old 07-05-2021, 11:10 PM #5
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Originally Posted by Drcoffee View Post
Rockauto.com , Denso sensor, about $110 each. Wrench is $10. 1000 videos to learn from on youtube
I bought a Denso O2 sensor for my 2004 V8 on Amazon for $38. The O2 sensor socket was another $12.

It was very easy to replace, and it was my first time replacing an O2 sensor. I have no idea why the stealership wanted $750 to replace two. $76 in parts and max $200 labor (I’m being generous).
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Old 07-05-2021, 11:13 PM #6
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Quote:
Originally Posted by Richrd View Post
Is the AF sensors just another name for an O2 sensor? If not, where would they be located and how hard to change?

thanks
What issues are you having? Is the engine throwing a code?
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Old 07-06-2021, 08:19 AM #7
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Be careful, buying car parts like sensors on amazon ebay etc. there are no protections against counterfeit parts. Or parts that didnt pass inspection and were rejected. There is a reason they are so cheap.
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Old 07-06-2021, 03:40 PM #8
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I pray you don't run into what I did -- the sensor was installed crossthreaded. Took an act of God to get it out, then a trip to a machine shop to borrow a proper tap...4 hours later I had the 10 minute job done.
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Old 07-06-2021, 05:39 PM #9
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Be careful, buying car parts like sensors on amazon ebay etc. there are no protections against counterfeit parts. Or parts that didnt pass inspection and were rejected. There is a reason they are so cheap.
So far, the O2 sensor has worked fine, and my fault code is gone. I hope it lasts! I try not to buy stuff on Amazon/Ebay from Chinese sellers, and it’s hard to do. I also have 8 spark plugs that I bought on Amazon a few years ago. No problems yet, luckily.
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Old 07-06-2021, 05:57 PM #10
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i stopped at "dealer says"! they may be right, but the dealers aren't called stealers for nothing! i'm helping a relation with a 2000 avalon loss of coolant issue. needs a new water pump. dealer wats to replace the TB pulleys and tensioner (car has 70k). one pulley is $340! i ordered a TB kit off Amazon with high quality pieces (Aisin, Koyo, etc) including all pulleys. total: $165.

be careful, shop things around.
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Old 07-17-2021, 06:45 PM #11
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I'm trying to fid the af sensor at rock auto, does anyone have the part number?
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Old 07-17-2021, 09:50 PM #12
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Use only denso. Rockauto.com. There is only 2. upstream and downstream.
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