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According to the Haynes manual for 98 Toyota tacoma, and a mechanic i just visited, two. One on each side of catalytic converter.

correction, there are two sensors, the first is an air fuel ratio sensor, and the second is the oxegen sensor. i know cause i had to replace both of them.

opie909

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13y ago
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Q: How many oxygen sensor are on a 98 Toyota Tacoma?
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