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Old 28-08-2009, 09:19 AM   #1
Jack91
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Default Bloody eBay

So, just bought what I thought was a new o2 sensor off ebay. Turns up covered in grease in some bubble wrap. Obviousely it isnt new (the copper bit is discoloured), so what do we usually clean these with? I might as well make use of it now Ive blown money on it. Bloody hell Im annoyed. Didnt say anywhere that it was used and the picture made it look new. My understanding with these though is that theyre not a re usable part. Anyone shed some light?

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Old 28-08-2009, 09:39 AM   #2
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They're a consumable item so it's a bit of a pointless exercise replacing your old one with an old one of unknown klms. Got a link to the item? If he has tried to make it look new and it isn't that is against eBay's T&C so you might have some recourse on getting your money back, first ask for a refund though.
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Old 28-08-2009, 11:06 AM   #3
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http://cgi.ebay.com.au/ws/eBayISAPI....:X:RTQ:AU:1123

I just got off the phone from him and he says its definately new and that they heat treat them when theyre made thats why the end that goes in the headers is discoloured. I suppose for $64 though its not worth stressing about.
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Old 28-08-2009, 11:10 AM   #4
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Quote:
Originally Posted by DAVO_XR
http://cgi.ebay.com.au/ws/eBayISAPI....:X:RTQ:AU:1123

I just got off the phone from him and he says its definately new and that they heat treat them when theyre made thats why the end that goes in the headers is discoloured. I suppose for $64 though its not worth stressing about.
This is true, post a pic up if you like. That does look new though.
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Old 28-08-2009, 11:12 AM   #5
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Yeah I dont doubt it is now, guess I expected it all bright and shiney, ah well thats made my day then.
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Old 28-08-2009, 01:13 PM   #6
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looks like the one i got ages ago for my I6... same colouring, and it was brand new...
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Old 28-08-2009, 01:15 PM   #7
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While Ive got a thread open, is it best to just swap them over or is it a good idea to run the car without one for a few minutes (so ive been told)?
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Old 28-08-2009, 02:35 PM   #8
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When I changed mine recently I fiited the sensor then reset the computer so it would relearn from scratch.
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Old 28-08-2009, 02:45 PM   #9
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^^as above.^^

That's all I done to mine as well
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Old 28-08-2009, 02:53 PM   #10
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Can you let us know how it goes? Interested to see if it improves your fuel economy.
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Old 28-08-2009, 09:07 PM   #11
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Yep will post on here but giving it a full service and new plugs and an ecu reset at the same time so not really the best comaprison but we'll see.
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Old 28-08-2009, 09:32 PM   #12
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I just recieved mine 2 days ago, and its the same. I remember thinking when I bought another one off him about 6 months ago, the b...ard ripped me off, lol. Did the same thing this time, till it hit me thats what it was supposed to look like, lol.
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Old 29-08-2009, 03:32 AM   #13
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I replaced my last year and the fuel economy did improve for a short time.If the sensor is new it should of had a plastic covering over the grease.
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Old 29-08-2009, 09:42 AM   #14
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Now when do these need replacing? What I mean by that is not the length of time but is there any symtoms to look for?
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Old 29-08-2009, 09:53 AM   #15
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Quote:
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Now when do these need replacing? What I mean by that is not the length of time but is there any symtoms to look for?
Every 100,000 kays.

As they wear the data they send to the computer is less reliable/accurate, which leads to incorrect fuel metering.

If there's any doubt about the data, our cars will run rich as a safety measure.

When I changed mine recently, I noticed an immediate gain in fuel economy and throttle response. Much crisper for sure.

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Old 29-08-2009, 10:58 AM   #16
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the grease is most likely anti seize on the thread
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Old 29-08-2009, 05:02 PM   #17
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Quote:
Originally Posted by EvilChief
the grease is most likely anti seize on the thread
Exactly.

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Old 31-08-2009, 09:13 AM   #18
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So, bit of a bastard to get in if you have pacemakers and a fat gut like me, but all in and there might be a really slight difference in economy too but nothing really noticeable. I think though that my old one is in good condition. As for power the car does feel more powerful but I dont know how the sensor would give me more power and torque, so its either because of the fresh oil and filter or its all in my head.
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