how many o2 sensors are on 1990 ls 400

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04-08-08, 10:46 AM

sherlock

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how many o2 sensors are on 1990 ls 400

i went to alot of sites and talk to the guy at oxygensensors.com and he is not sure as well as me how many 02 sensors are in my car, can someone here help out, he says there might be 4, or 2, can somone one tell me how many I need thanks

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04-08-08, 11:38 AM

Bradster

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4 total...2 before the CAT and 2 after..

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04-08-08, 04:11 PM

sonyman

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As said above, there are 2 pre-cat sensors and 2 post-cat sensors.

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