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oxygen sensor

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Old 09-15-2011, 02:48 PM
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i have a 98 z28 and i was wondering if there was a difference between an upstream and downstream o2 sensor?
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Old 09-15-2011, 03:18 PM
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NOPE.

The sensor itself is identical....the only reason you see different part numbers is because of wire lengths.

You can use the sensor in any port...back, front, left, right....doesn't matter.

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Old 09-15-2011, 04:08 PM
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If you are going to experiment by moving them, you'll want to be sure to use anti-seize on the threads...
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Old 09-15-2011, 06:45 PM
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thanks guys and i have to replace them for stupid emissions now i know why they have different numbers.
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