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  1. #1
    Veteran Member Four Rings pit viper's Avatar
    Join Date
    Sep 25 2008
    AZ Member #
    33435
    My Garage
    2000 A6 2.7
    Location
    Phoenix, AZ

    Which is Bank 1 Sensor 1?

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    I have a bad O2 sensor, and the code says it's Bank 1 Sensor 1.
    Which of the 4 O2 sensors is this?

  2. #2
    Veteran Member Four Rings Rated S's Avatar
    Join Date
    Apr 02 2007
    AZ Member #
    16916
    My Garage
    '01 S4 '94 D21
    Location
    Studio City, CA

    Re: Which is Bank 1 Sensor 1?

    Primary Passenger iirc (closest to front passenger side)
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  3. #3
    Veteran Member Four Rings mholme's Avatar
    Join Date
    Jan 29 2007
    AZ Member #
    15226
    My Garage
    08 S4 00 S4
    Location
    MD

    Re: Which is Bank 1 Sensor 1?

    Bank 1 is passenger side. Sensor 1 is primary, upstream sensor, near the firewall.
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  4. #4
    Veteran Member Four Rings pit viper's Avatar
    Join Date
    Sep 25 2008
    AZ Member #
    33435
    My Garage
    2000 A6 2.7
    Location
    Phoenix, AZ

    Re: Which is Bank 1 Sensor 1?

    Thanks guys. :)

  5. #5
    Veteran Member Three Rings Ianxcom's Avatar
    Join Date
    Jul 30 2008
    AZ Member #
    31438
    Location
    Socal/Denver

    Re: Which is Bank 1 Sensor 1?

    That's the easier one to get to.

  6. #6
    Veteran Member Four Rings AMC's Avatar
    Join Date
    Jun 15 2007
    AZ Member #
    18840
    My Garage
    '19 Spektrum Golf RS, '18 Audi TTRS
    Location
    CT

    Re: Which is Bank 1 Sensor 1?

    yes ur lucky its an easy place lol if it was bank 2 primary its more of a pain in the ass
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  7. #7
    Veteran Member Three Rings Ianxcom's Avatar
    Join Date
    Jul 30 2008
    AZ Member #
    31438
    Location
    Socal/Denver

    Re: Which is Bank 1 Sensor 1?

    ^No kidding. I just did the bank 2 sensor and by the time i was done it looked like my hand had been in a blender.

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