3rd Gen O2 Sensor Information
#1
3rd Gen O2 Sensor Information
So I just got through switching out my O2 sensor on my 4Runner. Very easy to do. Most of this information is out of the web, I thought I would put together a quick reference list for anyone else that needs it.
1) Tools
22mm oxygen sensor removal socket. Can be rented or purchased at Advanced Auto (~$30). These have a slit cut in them to allow you to slip around the wiring. Note: others will tell you to just use an 22mm wrench, up to you, just dont round it off. Mine was pretty rusted on, and was a breeze to get off with the socket.
2) O2 Cross Reference Sheet
There seems to be alot of questions about what P/N for which sensor, so here's a quick reference, I found for Denso (also list Toyota P/N and equivalent Denso).
3) Other thoughts...the bank 1 sensor 1 (A/F ratio sensor) on my 4runner is a bolt on; whereas, the bank 2 sensor 1 (O2 sensor) is a screw in. My 02 4runner is Cali compliant (2 cats). Another good website for oxygen and A/F sensors is URD. The best price I found on my Denso sensor was at Amazon. I love Amazon.
1) Tools
22mm oxygen sensor removal socket. Can be rented or purchased at Advanced Auto (~$30). These have a slit cut in them to allow you to slip around the wiring. Note: others will tell you to just use an 22mm wrench, up to you, just dont round it off. Mine was pretty rusted on, and was a breeze to get off with the socket.
2) O2 Cross Reference Sheet
There seems to be alot of questions about what P/N for which sensor, so here's a quick reference, I found for Denso (also list Toyota P/N and equivalent Denso).
3) Other thoughts...the bank 1 sensor 1 (A/F ratio sensor) on my 4runner is a bolt on; whereas, the bank 2 sensor 1 (O2 sensor) is a screw in. My 02 4runner is Cali compliant (2 cats). Another good website for oxygen and A/F sensors is URD. The best price I found on my Denso sensor was at Amazon. I love Amazon.
#2
Registered User
The socket tool is only needed for the '01-'02 years. Earlier years have flange-type sensors at both locations, including Cali. models.
There really is no such thing as Cali. compliant exhaust in '01-'02--all 4Runners (50-state) used the two-cat design in those years and Federal and Cali. specs are the same (just the testing and the bureaucracy are different).
There really is no such thing as Cali. compliant exhaust in '01-'02--all 4Runners (50-state) used the two-cat design in those years and Federal and Cali. specs are the same (just the testing and the bureaucracy are different).
Last edited by TheDurk; 08-07-2011 at 10:34 AM.
#4
#5
The socket tool is only needed for the '01-'02 years. Earlier years have flange-type sensors at both locations, including Cali. models.
There really is no such thing as Cali. compliant exhaust in '01-'02--all 4Runners (50-state) used the two-cat design in those years and Federal and Cali. specs are the same (just the testing and the bureaucracy are different).
There really is no such thing as Cali. compliant exhaust in '01-'02--all 4Runners (50-state) used the two-cat design in those years and Federal and Cali. specs are the same (just the testing and the bureaucracy are different).
#7
I changed out my A/F about 12-18 months ago. I had the CEL come on. Bought the replacement at sparkplugs.com.
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