How many O2 sensors does this truck have?

1999 MAZDA B4000
217,000 MILES • 4.0L • V6 • 2WD • AUTOMATIC
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1HAPPY1
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  • 1 POST
How many?
Sep 28, 2022 at 7:12 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

I attached an exploded view of the entire exhaust system below. From what I am seeing and reading, there are two. One is upstream from the converter and the other is right after it.

Take a look and let me know if that helps.

Take care,

Joe

See pic below.
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Sep 28, 2022 at 7:50 PM
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