Lambda Sensor changing mk4 golf

OO hubbys car had a problem today. The Oxygen sensor \ lamba sensor had gone to oxy heaven. He scanned it with a diagnostic thingy and it says 17604 oxygen lambda sensor circuit b1 s1 electrical malfunction" his freind said its the one before the cat (whatever that is, I'm sure I have no animals under my bonet, not that I check lol)

There is a bit of room to get at the sucker (his words) but it is simple a case of just un screwing it after youdisconnect the wiring loom bit and fitting the replacement and putting the elctrical plug back on ?

I said maybe he should spray it with WD40 and leave it overnight then try and unscrew the thingy magig.

I nearly spat a chocolate digestive when he said its £127 + vat for a new one and £60 for a garage to fit it. Hes quite handy at car stuff. He did my front brakes, and brake slight switch on a mk4 aswell. So sure I'm he can unscrew a blobby thing and put a new one in or does this requite some special tool other than a spanner ?

He can clear the fault on his scanner tool/

ooo this is for his mk4 golf 1.6 2001 his daily runner.

Reply to
Sarah
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there is a special socket for the job, without it he may find it difficult to undo

Reply to
Mrcheerful

he was just gonna use an adjustable spanner type tool like for his pedal bike.

I might see if I can find it this tool on ebay for cheap.

By any chance do you know the size I need or all they all generic ?

Reply to
Sarah

Forgot to ask, is it ok to drive the car like this or will it damage something ?

Reply to
Sarah

they are 22 mm & as Mr Cheerful says you need a special socket with a cut out in it. Dont use an adjustable you will round it off & then wont be able to undo it properly.

heres one on ebay

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but your local Halfords or the like will have one.

Reply to
reg

It won't do the cat any goos for a start.

Reply to
Chris Bartram

Oh No thats sounds expensive. I was just reading and it says it you have lambda problems it can cause the cat to crack! if you don't fix it. Also it can be another problem and not the cat like a fowled spark plug or a air leak in the exhaust manifold which I guess needs checking before forking out for a sensor! So I guess a few things need investigating first.

Reply to
Sarah

Can you clean a lambda ?

Reply to
Sarah

You can, and i have had some success doing so, but only usually after carbon fouling from an unrelated problem (causing rich mixture) but i would suggest in your case to replace the sensor.

Don't be tempted to use a cheap generic one, they dont last very long, and often give running and emissions related problems.

Tim..

Reply to
Tim..

You only need the special socket to do them up, you can undo them with a pair of side cutters & a normal deep socket.

Reply to
Duncan Wood

£127 + vat!!!! where from? I had to change two on my golf v6 4motion and they cost me about £83 + vat each - from VW. Fitting, I took it to a VW specialist who charged an hours labour (£35). Is the £127 + vat price the price the garage has told you. Suggest you check with VW.
Reply to
Slider

some vw ones are that much, vw polo one for instance

Reply to
Mrcheerful

Yes, but the £127 was for a mk4 golf, as were the two I bought for £83 each. To the OP, do you know the engine type code of your car (first 3 characters of your engine number, will be something like AEH, AGZ, AUE...) I have ETKA (VW/Audi parts software) and can check part numbers etc

Reply to
Slider

He managed to find a genuine this morning on shelf at car place, they said exactly the same thing to. And it has all the connector block bitsies so their is so soldering involved as with cheaper ones.

Reply to
Sarah

That quote was from VW. Why on earth owuld they quote that much more! gits!

No that £127 was just for one genuine lambda sensor.

Bloomin ek

Reply to
Sarah

OO that would be really handy. The engine number is AZD.

Thanks Slider.

Reply to
Sarah

Looks like prices have gone up then on Lambda sensors since the last time I bought mine. The V6 4 motion has 4 O2 sensors (2 before cat, 2 after). I got rid of the V6 due to 'common problems' associated with all mk4 golf's, it cost me a fortune in the 12 months I owned it.

Part number for the lambda sensor is 036 906 262 J

Reply to
Slider

Much appreciated Slider :)

They are expensive cars aren't they!

We've had broken window regulators, brake light switch go, leaky rear washer problem, broken clutch pedal to name a handful of them. I don't know why we don't see it. Probly because its been quite reliable despite everything. When its running good its a nice feeling. All these problems have been in about 2 years of ownership. So I guess its it ain't too bad but the parts are just sooooo expensive for little gizmo thingies vw want a fortune!

Reply to
Sarah

AZD should be using a 5 wire sensor so £127 price is about correct

Graham

Reply to
Graham

Thats an FSI is it not? But in any case- yes it should be a narrow band titanium 5 wire-er.

Tim..

Reply to
Tim..

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