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Walker O2 sensors S90-V90

The 960 does not use a titania sensor, and a titania sensor is not necessarily a 4-wire sensor. The fourth wire is a ground conductor, a really good idea as the sensors moved farther from the head to the cats. The sensor is the same in every way as a 3-wire zirconia sensor, with the inclusion of a ground return to eliminate depending on the rusty exhaust pipes for that purpose.

But the substitute sensor should have 4 wires as the original did, as that fourth wire is an improvement.






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New Walker O2 sensors [S90-V90]
posted by  poolman  on Sun Aug 27 10:55 CST 2006 >


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