OEM factory Oxygen sensor doesn't fit

[tftonner]

Picked up a Bosch OEM oxygen sensor for my 4 cyl. 97 Camry CE---and it doesn't fit. Pretty close to the one I plan to replace, but slightly off. One thought is that it might have been a mis-packaging at the Bosch factory, so I looked into another order---same part, same problem. I have thus ordered another OEM part, from another manufacturer. The store that sold me the part said someone had just been in the day before with the same problem/same part as mine. Hopefully the next part will fit...

[new echo owner]

I don't think Bosch is an OEM supplier for Toyota on O2 sensors, Denso maybe.

N.E.O.

[uibalnme]

Bosch is aftermarket, and garbage. Denso is the only way to go.

[ASG14]

x2 on both the responses.

[JamesT1]

Just replaced some O2 sensors and used the Densos - they fit perfectly.

[tftonner]

Figures...as always thanks much!

[tftonner]

Greetings---
Ordered a Denso Oxygen sensor---and it doesn't fit! Frustrated. The part will screw in fine, but will not couple together with the existing circuit in my car. It is, as was the Bosch part, slightly different in design and the two will not click together. In fact, the Bosch circuit head is exactly the same design as the Denso. I'm rather confused about this one...

[new echo owner]

Do you have a Cal spec vehicle? They use A/F sensor, not an O2 sensor.

N.E.O.

[BamZipPow]

Post up a piccie of the car side connector...

[tftonner]

Th car, as far as I know, is not a Cal spec. However, I have been operating under the idea that the A/F sensor and 02 sensor were somehow one in the same. The OBD readouts I got were:
P1135 Air Fuel sensor heater malfunction (Bank 1 Sensor 1)
P340 Camshaft position sensor malfunction

The part I have been trying to replace is almost identical to the O2 part I ordered, except for an additional plactic ridge on the plug area of the new part, which is why I cannot couple it to my car plug-in. That said, I somehow feel it is an O2 sensor I am trying to replace. If so, then is it possible that my '97 Camry CE 4cyl. is really a '96/'97, or '97/'98? I just cannot account for why the part is 99.9 percent there, except for a very slight difference in the plastic plug housing.

[new echo owner]

A/F sensor and O2 sensor work very differently; O2 sensor generates it own very low voltage, less than 1 volt, while A/F sensor changes a 5 volt reference voltage from the ECM.

97' 5sfe was the first year Toyota used A/F sensor, and only in Cal spec vehicles, and P1135 seems to be only applicable to Cal spec vehicles. Two things you can check, the emission sticker under the hood and the original part if you still have it. An A/F sensor would only have two rows of holes on the sensing part, while an O2 sensor will have multiple rows of holes. The A/F sensor and the O2 sensor actually look very similar, except for the above, and even for the connector part of it; however since this is the first year, the connector part is an unknown. BamZipPow is correct, if you can post a pict, it would be helpful.

N.E.O.

[BamZipPow]

Better yet...do you still have the old part you took out? Post a piccie of that, too!

[tftonner]

Stil have the old part---in my car. Need to track down a digital camera. In the meantime, the part in my car DOES have multiple holes in the sensor part---should be an O2 per N.E.O. Thus, why the continual issue with new parts? Hmmm.... In a perfect world, there would be a place called 'Sensors R Us" where I could literally bring the existing part and compare it...
Oh well...

[tftonner]

Ran my VIN#...it actually is a Cali spec car, and thus need an A/F sensor. Alwaya learning experience. Continued thanks for all the input...

[new echo owner]

How many 'rows' of holes in your old part? An A/F sensor has two rows of holes, one row close to the tip, and another row close to the thread end of it.

N.E.O.