welly Posted September 15, 2008 Share Posted September 15, 2008 Car is Legacy 2001 2.5l with 105,000 miles. Had leaking head gasket done at 100,000 miles and all is good. Car runs fine except have been getting CEL P0420 for last 3000miles. Resets itself but miles between CEl is getting less all the time. From reading posts on here I expect its due to bad pre cat sensor. However local dealers here in UK want $650 for a new Air Fuel Sensor the front one. I have got the part number and it is 22641AA100. However when I Google this the only source I can find is a Russian outfit who want a reasonable (in comparison) $180. Is this a part peculiar to Europe only - I wouldnt think so. The rear sensor is an oxygen one and retails here for $280. Part number on it is 22690AA640 which I can find a US source for at around $100. I have double checked on Genuine Subaru Parts and the AF sensor part number is not recognised. I dont want to spend $650 at all and especialy not if this isnt the problem. Link to comment Share on other sites More sharing options...
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