TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

has anyone found an alternative post cat O2 sensor (besides the universals)

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Old Apr 8, 2008 | 04:55 AM
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Default has anyone found an alternative post cat O2 sensor (besides the universals)

feel free to let me know that by not wanting to splice a universal on there i'm being too damn picky...

i ordered the 16109 from amazon (the one that you just have to trim the nub off of) looking for a similar setup for the post cat sensor.

there's been some discussion about a universal or other spliced in variants creating resistance from the splice and decreasing fuel efficiency.
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Old Apr 8, 2008 | 05:24 AM
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Default I actually ordered one using the Bosch P/N instead of the VAG one several years ago.

I think it was about half the price from the Bosch distributor.
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Old Apr 8, 2008 | 05:28 AM
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Default i found that on the Bosch website...

still $194 on amazon that about $192 more than they have in those things.
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Old Apr 8, 2008 | 07:25 AM
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Default NGK sells an OEM equivalent, no splicing rqd for $130

I've not tried it, but I use their plugs and OEM equvalent spark plug wires (my A6 2.8 has conventional spark plug wires, no coil pacs)...

and quality seems VERY good<ul><li><a href="http://www.ngk.com/default.asp">NGK.com</a></li></ul>
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Old Apr 8, 2008 | 08:45 AM
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Default i thought someone here said you can use the same one as the precat and the wire was long enough for

the post cat.
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Old Apr 8, 2008 | 08:47 AM
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Default that last statement sounds very bogus. Most likely made up and the rumor started flying around...

with no empirical data to back it up. O2 sensors have almost 0 current output (uA). Even with hundreds of ohms of a bad connection, the resulting voltage drop and slew rate effect is small. 2nd, the 1st O2 should be determining fuel trims.

However, if you'd rather not splice then that's your prerogative, and there's nothing wrong with that
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Old Apr 8, 2008 | 09:12 AM
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Default Re: and here's Bosch's suggested ones. Notice universal is same for front and back

Use the drops.<ul><li><a href="http://www.boschautoparts.com/Resources/VehiclePartFinder/">Bosch</a></li></ul>
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Old Apr 8, 2008 | 09:32 AM
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Default i imagine the wires for the post cat are significantly longer

but if someone could clarify...
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Old Apr 8, 2008 | 10:10 AM
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cool thanks. i ordered the 15733 universal for the post cat sensor
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Old Apr 8, 2008 | 11:02 AM
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good job but it doesnt work
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