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Thread: how easy is it to install a new O2 sensor?

  1. #1
    Registered Member

    2015 Mazda3

    Join Date
    Dec 2015
    United States

    how easy is it to install a new O2 sensor?

    The mechanic I know will do it for $100. I already have the parts. I really hate having to go under my car without a car lift that's why I probably don't even want to try installing it myself.

  2. #2
    Registered Member concept's Avatar

    2014 Mazda3 S GT auto, 2008 MX5 6-speed

    Join Date
    Mar 2009
    San Diego
    Most likely, you will need ramps and a special socket tool that you can borrow from an auto parts store. I've replaced a couple in Hondas and it was fairly easy with the tool and a socket wrench set. Sometimes the upper sensor can be replaced without the use of ramps but doing the lower one in a non-SUV is tough or impossible, depending upon the sensor's location.
    2014 3S GT, Deep Crystal Blue, Eibach Pro-Kit, Enkei PF01s, Koni Sports, Pirelli P ZERO ALL SEASON PLUS tires, 225/45/18
    2008 MX-5 Touring (Mazdaspeed CAI, HIDs, Progress/Koni Sports/Racing Beat sways, SST Magnaflow muffler and tips)

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