martin850

iTrader: (51)

Would the sensor from an MY97 fit striaght on my MY95 WRX and if not how hard would it be to wire up a universal sensor to the current block? Has anyone used one of them?

ticky

Check this out: Halfords universal lamba sensor (L300)

http://bbs.scoobynet.co.uk/showthread.php?t=310724

Scott.T

iTrader: (2)

MY97 should work fine, although the connector may be different.

If it is you can release the pins from the connector shell with a small screwdriver, then insert them into the connector shell for the other sensor.

It is a 4-Pin shell with 3-Pins and one blanked hole. IIRC the 2 silver contacts are white wires and are the heater elecment. The Brass/Gold contact is Black wired and the signal.

Take care to get them the right way round if swapping connectors.

I ran an earlier sensor in my MY00 and to be honest it felt better.

I may try an get another from the breakers as my Universal one is a bit poor when cold (worse then the standard one).

martin850

iTrader: (51)

Thanks guys. Can anyone tell me for defo how to wire up a universal lambda?

Scott.T

iTrader: (2)

4-Wire or 3-Wire and you need to ensure that it has heater wiring and a signal wire (as below) and not reference and heater wires as I have detailed at the bottom.

If you use a 4-wire, the extra wire is GND, which you can just run to Chassis or Battery. The 3-Wire grounds through the downpipe

You may also find that the wires have changed colours (the box mine came in had a leaflet detailing the changes)

The OE Sensor is 2-Whites (Heater) and 1-Black (Signal).
It does not matter which way the heater is wired.


Three Wire

Colour Connection
Black - Signal
White - Heater
White - Heater


Four Wire

Colour Connection
Black - Signal
Grey - Earth
White - Heater
White - Heater

You don't want a Titania O2 sensor which uses something like this :
Three Wire

Colour Connection
Black Ref. (out)
Red Ref. (in) & Heater (+)
White Heater (-)

martin850

iTrader: (51)

Thats great scott but I have just had a look and the only vacant connector is a round one that has two wires one red and one blue/black? Any idea if this is the one as it has been a while since I removed the old sensor?

Scott.T

iTrader: (2)

Not sure mate....

I would of thought it would have at least 3, because the Scooby Lambda sensor has an in-built in heater which normally requires 2 wires. Plus the signal wire.

The connector should be under the intercooler on a very short branch of the loom. The connectors I have seen on both MY94 and MY00 are 4-pin, with 1 hole blanked and the 3 available are heater x 2 and signal.

The Signal wire on the ECU side of the conector is normally white with silver bands.

martin850

iTrader: (51)

Ok mate I think I will have a better look at the weekend. Thanks for your help.