MY CHECK ENGINE LIGHT CAME ON. $70 Bucks later (at Dealer). I find out it's my rear o2 sensor @ $115 bucks! Where can I order a factory (or better) rear o2 sensor and how easy is it to install?

 

Next time, don't go to the dealer because of the check engine light. Somewhere there is a FAQ about how to diagnose it yourself. I got my rear 02 sensor at a dealer for $60-70, and it took less than half an hour to replace. All you need is a few wrenches and some way to lift the car up.

 

I have an O2 Sensor in my garage waiting for my sister to come over so I can install it. Right now its planned for the 12th. Fun fun...

 

You didn't specify the year of your Maxima. Dealers will replace Oxygen Sensors at no charge on some cars. I think it is '96 models. No matter if you are not the original owner of the car. No matter if your warranty has expired.

 

When my o2 senser went out my 95 GLE at 70,000 miles Nissan reimbursed me the full amount for parts and labor because of the recall.

 

got to: http://web2.airmail.net/scutchen/max...aintenance.htm
the following is an exert from the page:
Q: I have a 95+ Maxima and my "Check Engine" light just came on. How do I diagnose the problem without going to the dealer?

A: The ECU is to the right of the accelerator pedal. There's a black cover in front of it held there by two plastic rivets. Just pull the cover off (the rivets won't break... they'll just come loose. You will be able to reinstall it afterwards... well at least I was able to..).

Once you have access to the ECU, you will notice a screw on its side. Turn the key to the "ON" position but without the engine running. Your check engine light is now on.

Turn the screw all the way to the right.

Wait at least two seconds.

[This is the hard part] While stretching your head to see the check engine light, turn the screw all the way back to the left. The check engine light will start blinking.

There will be a series of L..O..N..G.. blinks and a series of short blinks. This pair of series will be repeated.

You must count the number of long blinks and the number of short blinks. This is your code. (Long blinks == left two digits of 4 digit code. short blinks == right two digits of 4 digit code).

[For example, my check engine light came on and I did this procedure. It repeats the following pattern: 7 long blinks and seven short blinks. Which means code 0707. Which translates to "Rear O2 Sensor" when looking it up in the service manual.]

go to these links to check your code: http://web2.airmail.net/scutchen/max_faq/engcodes2.gif
http://web2.airmail.net/scutchen/max_faq/engcodes1.gif

:Also there is a recall on the O2 sensors on 96 and I believe 95, I know for sure it is on 96 though. hope this helps you next time........