Which O2 sensor to purchase?

[changedsoul]

I have a problem. I found out I had a bad Air / Fuel Ratio sensor. I have a 2000 4-runner with the 4 cylinder. I went to Autozone and went through what they listed as for my vehicle. My first choice was this: Denso/Oxygen Sensor (234-9002) | 2000 Toyota 4 Runner 2WD 4 Cylinders M 2.7L EFI DOHC | AutoZone.com
But looking at the details its listed as mount type as screw and not flange even though the picture shows flange (which I have and need). So I chose not to get this one and went with this one instead: Denso/Oxygen Sensor (234-4162) | 2000 Toyota 4 Runner 2WD 4 Cylinders M 2.7L EFI DOHC | AutoZone.com

After I received it and tried to install it I found the wire length was incorrect and the plug on the end was the incorrect type, despite autozone's site saying its listed for my vehicle.

So I went to the toyota dealership to figure out which one I indeed need for my vehicle. They list one with this part number:

89467-35090

Now I looked up this part number online and found a cross reference sheet that listed that Toyota Part number as being the same Denso part number as this: Denso/Oxygen Sensor (234-9002) | 2000 Toyota 4 Runner 2WD 4 Cylinders M 2.7L EFI DOHC | AutoZone.com which puts me right back to the original one I was going to purchase, but didnt because its listed as an incorrect mount type.

Can anyone verify if maybe the mount type is a typo on the site, or any info as to which one I should get? I really do not want to pay $250 to the dealer if this Desno one is the same.

 

[SJC4Runner]

You can use this link to figure out which one you need. Oxygen / AFR Sensors - Underdog Racing Development

The information on that page which would relate to you is

2.7 & 2.4 V6 4Runners:
2000 California manual L4-2.7; Front = 234-9001
2000 California manual L4-2.7; Rear = 234-4622

1999 & 2000 California auto 2WD/4WD L4-2.7; Front = 234-9002
1999 & 2000 California auto 2WD L4-2.7; Rear = 234-4622 1999 & 2000 California auto 4WD L4-2.7; Rear = 234-4154


1999 California manual L4-2.7; Front = 234-9003
1999 California manual L4-2.7; Rear = 234-4622

1999 & 2000 49 State 2WD/4WD L4-2.7; Front = 234-4162
1999 & 2000 49 State 4WD L4-2.7; Rear = 234-4154 1999 & 2000 49 State 2WD L4-2.7; Rear = 234-4162


I would check amazon for the part, the cost was easily half of autozone and napa wanted for them. Even with overnight shipping it would be cheaper http://www.amazon.com/Denso-234-900...YCYS/ref=sr_1_1?ie=UTF8&qid=1319068794&sr=8-1

 

[TheDurk]

I can guarantee that the 234-9001, 234-9002 and 234-9003 are flange type. My 1999 V6 Cali. 4Runner manual uses the 234-9003.

The AutoZone site is just flat-out wrong as to the mounting type. You don't say if you are Cali. emissions, but if you are, that is the correct sensor. In the past, I also have found Amazon to have the best price, but their application info is unreliable. Just go there with the Denso part number.

http://www.amazon.com/Denso-234-9002-Oxygen-Sensor-Ratio/dp/B000C5YCYS/ref=sr_1_1?s=automotive&ie=UTF8&qid=1319070387&sr=1-1

At least their pic is correct:

The 234-4162 is for Federal emissions and will not work on a Cali. vehicle in '99 and '00 model years. Aside from the wire length, I believe the plug should be different and the sensor technology is completely different (standard O2 as opposed to wideband air/fuel).

 

[changedsoul]

Awsome, thank you both for the quick responce. hahah I would have never thought amazon. You guys not only helped me figure out which one I should buy, you saved me $80 bucks!!!

Thanks again.

 

[02SE]

My rear O2 sensor on my '97, V6, 5 speed recently stopped functioning. The Dealer wanted $150.00 for a new OEM (made by Denso) O2 sensor. Autozone wanted $100.00 for a Denso first-time-fit downstream O2 sensor.

I bought a Denso first-time-fit downstream O2 sensor, and a Denso first-time-fit upstream O2 sensor from Amazon, for $109.00 shipped.

They came with gaskets, and have been working great for the last three weeks.

My mpg had dropped off a bit the last few years. With the new upstream O2 sensor, the mpg is back to what the 4Runner got when it was new.

The original front O2 sensor wasn't setting a CEL like the rear O2 sensor, but after 14 years it was no longer operating optimally.

The biggest hassle in my case were the really corroded nuts holding the original O2 sensors in place. I ended up heating them with a propane torch, and then carefully clamping some vise grips on them to break them loose.

New OEM lock-nuts from the Dealer were $2.13 each.

 

[Nunyabiz]

The 234-9002 is the one I bought for my 2002 3.4l.
Amazon has it for $87.53 free shipping.

It definitely has the flange.

Amazon.com: Denso 234-9002 Oxygen Sensor (Air and Fuel Ratio Sensor): Automotive

.
.
.

 

[cordrayj1]

thanks for all the o2 info. . .

and for the cali specs. . .

but does anyone own a Cali Specific 2000 4runner 5speed 5vz that knows for sure what part numbers go with their vehicle. i havet replaced mine mainly because its gonna be expensive for 4 of them and i just dont want to get the wrong one.

 

[TheDurk]

thanks for all the o2 info. . .

and for the cali specs. . .

but does anyone own a Cali Specific 2000 4runner 5speed 5vz that knows for sure what part numbers go with their vehicle. i havet replaced mine mainly because its gonna be expensive for 4 of them and i just dont want to get the wrong one.

First, there are only two in the third gens: front and rear. The 4th gens have four. My '99 5-speed V6 Cali. 4WD is the same as yours (unless you are 2WD--those are different). 1999 and 2000 were the only Cali. specific model years and are set up the same. I just checked my original invoices from URD (back before Amazon was the best deal) and I used 234-9003 in front and 234-4153 in back. I had previously stated 234-9002, but I just realized it's wrong on my Excel parts listing I keep. If the OP is an auto, 234- 9002 is right for him. I changed my previous post. This jives with what you will find here:

DENSO Aftermarket Online Catalog Search | Vehicle Parts Search

 

[changedsoul]

Back again. I just got my "NEW" Denso First time fit 234-9002 oxygen sensor. I checked the heater because mine was open on my old one. Service manual says it should be 5-7 ohms. My new one is 1ohm. Now what should i do? Im afraid to install it with such a low resistance and have it toast my computer.
Any thoughts? Should i return it?
Perhaps someone who has this particular brand and part number can check their heater resistance and verify if its is out of spec or not?

 

[changedsoul]

Ok, well I am going to go with my gut here and return it. I wish someone could have confirmed or denied if this was defective. Ill find out if I get another one and it too reads a very low resistance.

 

[hitman45]

I had experienced the same problem changedsoul went through. I own a 2000 Toyota 4Runner 2WD L4 2.7DOCH automatic non-calif. and my car has being diagnosed with a bad REAR O2 heat sensor;basically, I want to know which DENSO part fits best in the car, or better yet, what DENSO part did mr.Changedsoul purchased at fitted perfect...please help

 

[TheDurk]

I had experienced the same problem changedsoul went through. I own a 2000 Toyota 4Runner 2WD L4 2.7DOCH automatic non-calif. and my car has being diagnosed with a bad REAR O2 heat sensor;basically, I want to know which DENSO part fits best in the car, or better yet, what DENSO part did mr.Changedsoul purchased at fitted perfect...please help

Changedsoul is a Cali. You are not. (Are you absolutely sure? Not many non-Cali. 2000's were made, it was the last year they made those, and Cali. models were sold all over the country.) Anyway, according to DENSO Aftermarket Online Catalog Search | Vehicle Parts Search, the Denso part number is 234-4162. For a Cali. Auto 2wd 4-banger, it is 234-4622.

 

[hitman45]

Thanks for the info..But In that case, how can I tell if mine is Calif or non-calif?..I'd just found out that the part number is 89465-3535C..thos this part number gives me info if this car is calif or non?..(I lost the Owner's Manual)

 

[hitman45]

Sorry,I meant:89465-35350 not 89465-3535c

 

[Pikeman]

To find out if it is Cali or Non Cali open your hood and look at the emissions stickers. It will say meets Fed standards or Cali standards.

 

[cordrayj1]

This is a cali sticker.

Sent from my MB860 using Tapatalk

 

[fLeesmarket]

How to find out if my 4R is Cali w/out sticker?

I've read through this topic and gotten some extremely helpful info (thanks to all the previous posters!).

The image of the sticker is helpful, although my car no longer has it because my hood was replaced because of an accident.

Can I find this out by searching my VIN?

I'm assuming this is a Cali because it was purchased new in Arizona but I want to be sure.

Any sites out there that give car info that specific based on VIN?

Thanks in advance. This an amazing forum!

 

[TheDurk]

The Cali. thing was only around for two years (1999 and 2000) and, AFAIK, you can't get that answer by decoding the VIN; the VIN just doesn't carry that info.

You have to be able to access the actual build sheet for the vehicle. Dealers can do this, but I have never seen a way to do this on-line like you can for BMW's.

I strongly suggest you just get under the truck and count cats.

The exhibit below suggests Arizona is NOT one of the states that required the Cali. type system prior to 2001, so you are in a "maybe" state.

http://www.epa.gov/otaq/cert/dearmfr/st-tbl.pdf

Note that the 2001 column on the table never came in to play as enough states had joined the voluntary program that it became mandatory in all 50 states.

 

[fLeesmarket]

Awesome, thanks for the quick reply. So the Cali version has 2 cats I would assume?

I have 2 sensors and the front one is out. My specs are: 2000 - 2WD, 2.7

And based on URD, if mine is not Cali, I should be looking for this one, right?:

1999 & 2000 49 State 2WD/4WD L4-2.7; Front = 234-4162

...so I am planning on purchasing this one: Amazon.com: Denso 234-4162 Oxygen Sensor: Automotive. I was hesitant because the reviews seem mixed ("it didn't fit"), versus the 9002, which seems like it's more widely reviewed as "perfect fit". I'm referring to this one: Denso 234-9002 Air Fuel Ratio Sensor : Amazon.com : Automotive

I just want to make sure I'm buying the right one. My husband is doing the repair and we dont have a garage or a lift so he's fiddling with the truck while parked on a city street. As a last resort we were going to pull it out of the vehicle and do a compare & measure.

 

[TheDurk]

Awesome, thanks for the quick reply. So the Cali version has 2 cats I would assume?

I have 2 sensors and the front one is out. My specs are: 2000 - 2WD, 2.7

And based on URD, if mine is not Cali, I should be looking for this one, right?:

1999 & 2000 49 State 2WD/4WD L4-2.7; Front = 234-4162

...so I am planning on purchasing this one: Amazon.com: Denso 234-4162 Oxygen Sensor: Automotive. I was hesitant because the reviews seem mixed ("it didn't fit"), versus the 9002, which seems like it's more widely reviewed as "perfect fit". I'm referring to this one: Denso 234-9002 Air Fuel Ratio Sensor : Amazon.com : Automotive

I just want to make sure I'm buying the right one. My husband is doing the repair and we dont have a garage or a lift so he's fiddling with the truck while parked on a city street. As a last resort we were going to pull it out of the vehicle and do a compare & measure.

Relax. 234-9002 is an air/fuel sensor; that means it goes on Cali. type trucks. Non-Cali. trucks use a regular o2 sensor in front.

There does appear to be some problem with Amazon's fitment info; I never use it because it is frequently wrong.

However, the problem appears to be with Tacos and Tundras in this case.

I use http://www.densoaftermarket.com/catalog/catalog.php?part=o2sn.
This confirms 234-4162 for non-Cali. 2WD rigs with the 2.7 and 234-9002 for Cali (if auto) and 234-9001 (if manual).

Here is a diagram of the Cali. exhaust:

Here is the 49-state:

Yes, the Cali. has two cats. So print this out and tell hubby to climb under the truck. No lift is needed to change these.

Just to be clear--both systems use two sensors. So you need to to count your cats to be sure which one you have before buying.

Check the condition of the nuts--in AZ they are probably ok, but if not, they are 90179-08059 at the dealer, or any M8-1.25 stainless nut you can find.