O2 sensors upstream and downstream?

2005 FORD RANGER
160,000 MILES • 3.0L • V6 • 2WD • MANUAL
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RICH NORBY
  • MEMBER
  • 30 POSTS
Trying to determine witch sensor is upstream and downstream I have trq osa61305 and trq osa61313 sensors.
Mar 27, 2026 at 2:02 PM
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CANNON1349
  • CAR REPAIR CONTRIBUTOR
  • 861 POSTS
Hello, osa61305 can be used as the upstream and osa61313 can be used as the downstream.

Thanks,
William
Mar 27, 2026 at 3:25 PM
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