A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Modifying O2 Sensor

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Old Jul 14, 2002 | 10:35 AM
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Default Modifying O2 Sensor

I was searching audi stuffs at ebay, and discovered that someone is selling modified 02 sensor. He claimed it will gain about 20 hp. has somebody ever tried this? (search on ebay using keyword: audi a4 o2 sensor). Thanks
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Old Jul 14, 2002 | 10:41 AM
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Default this must be the new fad in "modding"

i think this is the third or forth question in the last couple days. Kinda like nitrous oxide afer the Fast n' Furious.

To answer your question: No, don't do it. The O2 sensor is calibrated correctly from the factory. And even if you *could* get some hp by changing the air/fuel ratio, the O2 sensor is adaptive and will eventually "get used to" the new settings and will go back to stock air/fuel settings.
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