which lambda
 

do i have in my95 jdm wrx

can see it has 3 wires but cant see the name as its rusted over

Hello mate.
Your right, you have got a 3 wire lambda sensor fitted. If you ring a subaru dealer they can sort you one out for £130. Other wise you can buy 'universal' sensors that will fit for as little as £16.

Or get one of these,

http://www.gendan.co.uk/oxygen_lambd...rs_Subaru.html

How can that be a direct fit. It has 2 connectors (1 2-way and 1 single pole). The OE is a 4 pole connector with only 3 used.

Go for the cheap 3-wire universal. I've not had a problem with mine http://www.buypartsby.co.uk/lambda_sensors.php

Or this...

http://www.camskill.co.uk/products.p...d=m10b82s189p0

A mate bought one of these last week, and sent it back.

It was 4 wire, NOT 3 wire
The connector was wrong
The pins in the conector were male instead of female.

So wrong in everyway except it was an M18 fit, which is correct.

Not sure how the above make it OE fit.

Thanks for the heads up, was gonna get one....not any more :D

Did you have to solder the plug onto this one?

thanks guys

:nono: Dont fit the cheapo jobbie! the are two types of lambda sensors which have different chemicals inside them, Zirconia and Titainia. They both give different readings out to the ecu so fitting the cheap one will give the wrong voltage or resistance to the cars computer meaning you will fuel mix is wrong:(

Guess what:wonder: Subaru use the expensive titainia sensor so get this one! Failure to pay out on the part will lead paying out at the pumps and possible emissions issues!!:cry:

there's nothing wrong with the 3 and 4 wire ones from here. Just use the crimp sleeves provided to attach your own plug.

titania and zirconia lambda's cannot get mixed up as they have different connection requirements. i.e if you have the wrong one it will just not work.

For a Subaru you need 2 heater wires and a Signal wire. You can cee from this link that titania lambdas have different connection.
See http://www.ntklambdasensors.co.uk/main/mcolours.htm

The 3 wire zirconia is fine, and I run an AFR which shows it's running at the right voltage.

Repeat : For a Subaru you want a Zirconia

Quote :
The operating principle of a titania lambda sensor is entirely different from that of a zirconium lambda sensor. A titania lambda sensor works like a coolant sensor. It changes resistance as the air/fuel ratio goes from rich to lean. But instead of a gradual change, it switches very quickly from low resistance (less than 1000 Ohms) when the mixture is rich to high resistance (over 20,000 Ohms) when the mixture is lean.