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When to replace the oxygen sensor?

Discussion in 'Gen 3 Prius Technical Discussion' started by R1CH13, Oct 7, 2014.

  1. R1CH13

    R1CH13 Member

    Joined:
    Feb 26, 2013
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    Location:
    Michigan
    Vehicle:
    2011 Prius
    Model:
    Two
    I've been looking online to see how often you need to replace the oxygen sensor for the 3rd gen Prius. I can't find anything online. Anyone know how often you replace these? Would it be around 100,000 miles or more because it's a hybrid? Also how many are there? I've heard there is 2 and some say there's 4. Thanks
     
    #1 R1CH13, Oct 7, 2014
  2. CARspec

    CARspec Junior Member

    Joined:
    Sep 30, 2014
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    Location:
    Eden Prairie, MN
    Vehicle:
    2014 Prius Plug-in
    Model:
    Plug-in Base
    When they fail. Don't worry about it until they do, and don't replace any more than the failed unit if one does.

    You car has one Air-fuel ratio sensor and one oxygen sensor. The former has more range than the latter.
     
    #2 CARspec, Oct 7, 2014
  3. tv4fish

    tv4fish Member

    Joined:
    Oct 21, 2011
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    Location:
    Minnesota
    Vehicle:
    2010 Prius
    Model:
    II
    And if/when you replace either one - make SURE you order and get the correct one - a lot of these "aftermarket" suppliers don't know the difference between the 2. (Yes, the voice of experience).
     
    #3 tv4fish, Oct 9, 2014
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