[nj77]

The bank 1 is not registering a working PID
The bank 2 is stuck lean with error in test results

Catalyst won't set, etc

I was reading the Denso OE upstream sensors don't always last

107k miles

Question is, what brand sensor should I buy to replace the bad air/fuel sensors?

Are their good brands that last?

Thank you very much for any help

 

[dandaman]

I just replaced my Camry with a Denso sensor. O2 sensors are generally rated for 80-100k miles lifetime. I would say your OE Densos "lasted".

 

[nj77]

I just replaced my Camry with a Denso sensor. O2 sensors are generally rated for 80-100k miles lifetime. I would say your OE Densos "lasted".

What year is your camry? what mileage did you replace yours at?

The old O2 sensors seem to last longer than the newer Air/Fuel sensors (which also cost more).

I think the sienna started using the newer air/fuel sensors in 2001. I previously had a 2000 bmw 323i and those oxygen sensors lasted over 200k (old style), but they were also rated at 100k like you said

 

[dandaman]

My Camry is a 2010 and it hit 75k. A little earlier than I would've liked but not outrageously so. Our Sienna is at 150k and still on the original sensors (although I may replace those soon as a preventative measure). I only replaced the downstream sensor, it would trigger a code every couple of days and usually decelerating from highway speeds.

As with anything else in technology, advances make the newer sensors more accurate but also more delicate and adds more opportunity to fail. With O2 sensors, though, they generally do not outright fail. They instead become slowly less and less efficient until their inefficiency is finally detected by computer. Kind of like if you had a thermometer that was 3, 5, 10, etc. degrees off from the norm and then one day you went out expecting it to be 20 and it was actually 65. With so many extra sensors on newer engines now there are more ways to the engine to detect the decreased efficiency of an O2 sensor when it's output doesn't match everything else going on too, which may make them seem more fragile than old sensors.

 

[Endzone3]

In my 2003 Avalon, the bank 1 sensor 1 failed at 92K miles. I had a 2000 Avalon previous to this, and bank 1 sensor 1 failed at 90K miles. My dad has a 2003 Avalon, and none of his A/F ratio sensors have failed. It just depends on the car. I replaced both front and rear with Denso A/F ratio sensors I bought from Rock Auto. The car just ran so much better with both sensors replaced:


http://www.toyotanation.com/forum/1...on-code-p0135-f-sensor-bank-1-sensor-1-a.html

 

[nj77]

Yeah. Interesting. I think the newest cars are overboard with 90 sensors. But then in 7 years that will be the common place thing. =)