I failed my emisson test the other day, and now im desperate to fix the problem. I searched and read that the 02 sensor had to do something with my idle. Does anyone know anywhere i can buy one? i know i can buy one from mazdatrix but I don't want to pay 130ish and I hear that the universal sensors aren't that great. Any reccomendations? Thanks.


Also is it true that a new O2 sensor can IMPROVE your gas mileage?

 

I've never heard of the o2 sensor effecting idle. It will only help gas milage by a few mpg. It can screw with the emissions, though. I used the bosch replacement from autozone and it worked fine. I think it was less than 50.

 

I got mine at Advanced Auto for 18

 

Does anyplace sell OEM ones?

 

When my O2 sensor was bad, the rich exhaust was turning my rear bumper black. Replaced the O2 sensor with a generic one I bought at Advance Auto, and the problem went away. During all this time, there was never an issue with idle being affected.

 

I have NTK Oxygen sensors in stock for a 91' n/a cost is 50.00 shipped

u should use a OEM, DENSO or NTK dont use BOSCH or any universal get a direct fit oxy.

I plan to use the NTK or Denso on my 86 n/a

 

Thanks for mentioning about the rear bumper, I was always wondering how could my rear bumper get all this dirt on it SO quick? I'm about to go get one today. Thanks for the help.