has anyone got pics of where this is and how easy is it to remove and clean cheers

 

Assuming you haqve a classic and newer than 94..

Look under the bonnet



Find where the bonnet scoop lines up with when the bonnect is shut
on the left hand (drivers side) it got into the turbo heat shield and the downpipe is just behind that with the Lambda sensor in it
See pic:



Ignore the white wrapping as you won't have that on a standard car..
The nut on thr lambda sensor is 22mm or 24mm I believe, mine was 22mm on a 96 car.
The thread sometimes strips but assuming you are changing it this shouldn't hopefully cause a problem.. spray with WD40 a number of times before trying to remove it and allow a couple of days for it soak in etc.. if you can

Removing the Turbo heat shield allows better access but is a pain in the backside..

JGM

 

cheers M8, its great to have such a positive responce from other owners, cant see myself ever swopping the scooby for anything else

[Edited by MarkB1 - 2/19/2003 9:47:03 PM]

 

It does make a huge difference... I only know what I do now from people on here and the other forum sites..

Although a Haynes manual would still be handy (I keep saying that maybe someone at Haynes will listen eventually).

Just noticed you said you were going to clean it..

Watch the thread when you undo it then as you want to be able to refit it etc..

Not sure if there would be much to be gained from cleaning it as I presume at the temperature that is running at everything would be cleaned off by the heat.. never know though..

If you need a new one you can get secondhand ones from Grade A Subaru and new ones I believe at a good price from GGR. Both of which have websites that you can find on this links page, as well as other useful companies http://www.mudd90.freeserve.co.uk/links.htm#specialist

JGM

 

JGM,

mine's a 96 WRX but the lambda sensor isn't there
I'm not actually sure where it is, but I put one in anyway as it was the right size for the hole, but it doesn't work that well as an exhaust heat probe

I had a spare knocking around, I don't know how much grade a charge, but I can get you one for £35 + postage (it's a bosch universal lambda with 2 wires)

 

Just done this today!!

This is what i had to do on our MY00 WRX RA.....

It was impossible to get any purchase or movement on the Lambda sensor nut without removing the heatshield (10mm) bolts.
Some of these heatshield bolts are really difficult to get at and the ones at the bottom resulted in the car being up on the jack (with front wheel off) so as to get them out from underneath.

After doing this i found i still couldn't get the heatshield off and out of the way completely (it was catching on the intercooler bracket)- but it just gave that little bit more room to work with it being loose.
I also gained a bit more room by undoing the 12mm bolt that holds the Brake fluid cylinder shroud in place (as seen in the image above) - which allows the shroud to be moved out of the way.

The sensor itself was not too tight - i had however been giving it a soaking of WD40 for a couple of days previously and the manifold and heatshield etc were still warm from a previous run.

Fitting the sensor was just a reverse of the above procedure - the only thing being that i could not get two of the most difficult heatshield bolts back in (physically impossible to get my hand in to start the bolt off) so these will have to wait for next service (luckily there's no sign of any vibration sound as a result.)

Good thing is it seems to have made an instant cure to the erratic ilde speed problem and the car feels as though it's running much sweeter!

Go to it!
Dave.