O.K. sorry I'm kind of new at this but here's the problem.
My car recently failed inspection,The check engine light has been on for a while and I have like 120K miles on the car.
The mechanic at the shop told me it failed inspection because the oxygen sensors were bad and it would cost me about $900.00 to fix.The car is getting old and I don't really want to spend that much,I only plan on keeping the car for about another 50-60K miles but I do need the inspection approved.
I would like to repair it myself ,Can somebody tell me how many 02 sensors, where the oxygen sensors are located are and how much it would cost for the parts or what the part numbers are?
Thanks,
Eric

 

wow 900 dollars is crazy. what kind of car??

 

year make and model engine size ect

 

That mechanic is a moron? oxygen sensor is only or at least $200.00

Just go to a mechanic that can install it for $80.00 and buy the oxygen sensor yourself
Pep Boys or Autozone sells them.

do not go back to that moron who want 900 for the sensor. if he is replacing the whole exhaust system that would work.

check how many oxygen sensor on your car? some cars has 2 sensors.

 

it is near the catalyctic converter in the middle of your car (underneath)

if 2 the other one should be near the exhaust manifold depending on the car.

 

yep and its really not a hard thing to do if you want to do it yourself. you can pick up a haynes manual and two sensors for 60 bucks and have it done.

 

Sorry,
The car is a 2001 Mitsu Montero sport 6 cylinder.

 

go to autozone.com and look at their repair guides if you dont want to get a haynes manual. it depends were the o2 sensor is but it would be much cheaper to diy.

 

This vehicle has 4 oxygen sensors. You need to know which one or more is bad, if you paid at the shop where you had it diagnosed they should tell you which one/ ones.

bank 1, sensor 1
bank 1, sensor 2
bank 2, sensor 1
bank 2, sensor 2

basically primary and secondary sensors (before and after cat) for each bank of the V-6

typically aftermarket sensors come without connectors. you have to splice the wiring harness with a crimp or solder connection, so 4 wires each sensor, you have to know which is which, they usually come with directions.

spray some rust penetrant on the bad sensor threads before removal, they get rusted sometimes and will seize up. Put anti seize on the new sensor threads if it doesn't already have some

If this Montero is high miles it probably leaks oil from the driver side rear cam plug onto one of the primary sensors and makes it go bad. So you might have to look at that to keep the new sensor from going bad too.

After the sensor/sensors are replaced you have to clear the check engine light or it won't pass emish. The cheapest code reader/eraser is about $70, but maybe Pep boys will loan/rent.

Google "Mitsubishi oxygen sensor" "purchase" you get a ton of hits.

Did the tech clear the check engine light? Sometimes the O2 will just be getting a little weak, or there was some bad fuel, and you can clear the code and it won't recode. If it recodes right away it's bad for sure, sometimes it's just a cut wire, you have to look it over.

 

If you buy an aftermarket sensor that needs the wire harness spliced it can be tricky if you want the repair to last. You need the crimp connectors that come covered with shrink tube and you have to use a crimper tool made for insulated terminals.

Otherwise get a factory sensor which will already have the connector.

Just one sensor from the dealer can be up to $400. Here's an online supplier of factory parts for less. I'm in no way affiliated just saw them on another Mitsu forum.

http://www.mitsubishiparts.net/