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First, what makes you sure that the Lambda probe is faulty? Second which engine does the car have? Third, if the car has two Lambda probes, do you know which one is faulty?
PCVSM
Guest
VAG COM should be telling you which sensor it is finding faulty and why, is it S1 or S2 ? If it is S1 then that is the probe that is fitted into the manu-cat and its lead connection is in a fixing with some other connections below the engine. If its S2 then that is the post cat sensor and its connection is in a plastic protective box at the RHS of the car. You can usually remove these probes by using a spanner (well that was what I found), the S1 probe is quite difficult to reach and you might need to remove the fixing bolts on the heat shield. Maybe check the plug and socket to make sure that they are okay and the leads are okay before buying a new probe - oh and you will probably find that buying the correct probe from VAG is the best way to sort this - BTW, VAG tend to use NGK probes - but they are branded NTK by NGK.
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I would have said you were better going to a dealer for that part, as you dont know what condition one off ebay will be in. I dont think they are that expensive either - but please correct me if im wrong.
Okay, maybe take a look on www.lambdapower.co.uk to try and identify your Lambda probe - use your type type - ie code to search. You really need to find out if the engine uses two probes or just one. If it uses two, then if the 1.2 is like the 1.4, then S1 sensor will be fitted into the manu-cat - ie exhaust manifold-first-catylst. Once again, if its the same as the 1.4 engine, you will need to remove the securing bolts for the heat shield on the manifold, and if you get under the car, you will find the S1 probe at the back of the manifold - you can reach it with a 22mm open ended spanner as there is not enough room to use a Lambda probe socket. Find the plug/socket - low down on a bracket with some other connectors. I think buying at a VAG garage is your best plan although "LambdaPower" supply NGK (NTK is the brand name for probes) and VAG use NGK.
The number that you have listed will probably relate to the basic Lambda probe and not the probe after the wiring has been connected to it so that it fits that car.
I found that it was the same price to buy from VAG anyway - plus they should give you the right one without you having to guess which one to buy!
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I've just seen an under bonnet picture of a 1.2 engine and the Lambda probe is the "thing" sticking out of the exhaust manifold - you can see it when you open the bonnet - so that makes replacing it a lot easier.
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