My oxygen sensor has died and Mitsubishi is charging me $300 for it....not sure if that's with labour or not. Just wondering how much ppl r charge for a new oxygen sensor.

You can put the sensor in yourself. Just screws into the exhaust and then plugs into a loom.

10 minute job (or 5 minutes if you don't have the beer after).

You can put the sensor in yourself. Just screws into the exhaust and then plugs into a loom.

10 minute job (or 5 minutes if you don't have the beer after).

Actually, since you have to remove the air tray under the glovebox, remove the glovebox itself (and or the top mount of the glovebox), pull back the carpet, remove the side re-inforcing panel of the 'console', feed the sensor wires and one way grommet up from under the car... AND THEN PLUG IT ONTO THE LOOM at the ECU - bit more than 10 minutes there. Car also needs to go on a ramp and you'll need a large shifter or spanners to remove and refit the actual sensor from the tailpipe.

$300ish from Mitsu is about right for the part only - you can get them from Repco (Bosch part) but they don't come with the dedicated loom fitting so its a cut and splice job and that's a bit complicated as the wiring colours are a bit hit and miss. I sold my Bosch one on and bit the bullet for a mitsu one - at least that way I was sure it was wired correctly.

I'll just let mitsubishi do it then. :D

How did you know the Oxygen Sensor had died ?

What were the symptoms ?

How did you know the Oxygen Sensor had died ?

What were the symptoms ?

I asked mitsubishi to check my cat converter to see if it needs replacement cos after a really hard run u can smell a bit of rotten egg smell....They checked it but it was working fine. But they picked up my oxygen sensor was faulty..probably from their diagnostic computer.
I did notice that over the last 4 months, frequent long distance driving to brisbane and return (7 hours trip) that it's using slightly more fuel but just thought that older engine uses more petrol. That's just me being simple.....does older engine use more petrol?

Should have done it yourself could have saved yourself just over 200 bucks. Search is your friend. The universal 02 sensors generally run the same color wires at the 02 end so it would have been difficult to get it wrong.
Anyway its fixed now enjoy the fuel savings.

Regards

I did notice that over the last 4 months, frequent long distance driving to brisbane and return (7 hours trip) that it's using slightly more fuel but just thought that older engine uses more petrol. That's just me being simple.....does older engine use more petrol?

A busted O2 sensor will affect closed-loop, which you'll be in when cruising, or anywhere less than, say, 25% load. During that time with a working O2 sensor you'll run close to 14.7:1 AFR, but if the ECU can detect that the sensor isn't working properly it'll probably run the car richer than that to be safe. So yes, your increased fuel consumption could have been caused by the failed sensor.

if you are going to replace yourself...
please remember to put "copper slip" on the threads... otherwise you will never get it undone... EVER!!

thanks for the advise..but i think i'll leave it to mitsubishi to replace it. have to wait a few days for the part to arrive.

Anyone know how much to buy the O2 sensor from the Mitsu parts desk?

Anyone know how much to buy the O2 sensor from the Mitsu parts desk?

from (rusty) memory about $260 plus GST

If they're cheaper, aftermarket heated sensors can't be too hard to wire up.

usually 4 wires -
white - 02 signal
black - signal earth
two the same colour - heater ( 12v and Earth - doesn't matter which way around they are connected )

Hope this helps someone. :P

Aftermarket non-Mitsu items are around $100ish, supposedly.

Aren't they ALL made by Bosch anyways?! :confused:

Save $100 by soldering on the plug recycled from your old sensor... hmm...

got the new oxygen sensor today...will see how the fuel comsumption goes over the next few weeks

stupid question what is an oxygen sensor and what does it do and when should u replace it.

stupid question what is an oxygen sensor and what does it do and when should u replace it.
Ummmm ditto .Doesn't it measure the exhausts to see how much fuel is unburnt or something

stupid question what is an oxygen sensor and what does it do and when should u replace it.

I'm pretty sure it measures how much air is going into the car and in turn gets the air/fuel mixture correct. A stuffed one will get worse economy due to over fueling I think.
They should be replaced every 100k or when you notice the cars using more fuel.

stupid question what is an oxygen sensor and what does it do and when should u replace it.

its a little sensor that sits in the exhaust pipe just after the collectors, and it measures the amount of oxygen there is in gases, along with unburnt fuel.
if there is unburnt fuel in the gases (there will always be some from the way the engines are designed to run) the computer is able to adjust the amount of fuel it squirts in.
there are two types of o2 sensor out there - wideband and narrow band.

i believe (but not 100% sure) that the wideband o2 sensor is the one with the heater in it which helps in giving a more accurate reading to the computer.

if the o2 sensor isnt working correctly(it 'knows' a range in which it should be getting readings for a certain load and rpm etc), the computer will generally compensate for this by richening the mixture (air and fuel into the cyclenders) to save your engine.
a richened mixture (more fuel in) is a bit kinder to an engine than a leaned out (less fuel put in) mixture, as an overly lean mixture will kill your motor.