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Thread: Need help removing an oxygen sensor.

  1. #1
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default Need help removing an oxygen sensor.

    Hi
    I have my new oxygen sensor ready to go but I can't for the life of me get a good enough grip on the old one to remove it. I have a bently book but that doesnt give much info. I brought an adapter for my socket wrench from autozone but the clearance above the sensor isn't enough to fit the adapter on and remove it (this is the part on the exhaust system, not the pull-out part closer to the engine). Does anyone have any suggestions on how this can be removed easily?
    An update for anyone who remembers, I finally fixed the oil leak on my car...it turns out sealant was necessary on my valve cover head.
    Thanks
    Nathan

    Black 1995 525i 100K Mi
    Nat1

  2. #2
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,843

    Default

    chop the top of the old sensor, you dont need it anyways. then pop in the new unit.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  3. #3
    Join Date
    Oct 2004
    Location
    Honolulu
    Posts
    3,105

    Default Do you have a box wrench?

    If not you may have to un do a few hangers to lower the exhaust for more access.


    Vee ave vays of dealing vid your kind...........

  4. #4
    Join Date
    Feb 2004
    Location
    Wichita KS
    Posts
    180

    Default

    Ditto. On my car I have to unhook the exhaust hangars and lower the pipe to reach the O2 sensor.

  5. #5
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default

    Thanks for the replies...how do I go about undoing the exhaust hangers?

    Black 1995 525i 100K Mi
    Nat1

  6. #6
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default

    Quote Originally Posted by Blitzkrieg Bob
    If not you may have to un do a few hangers to lower the exhaust for more access.
    Hi, I dont have a box wrench..just a regular ratchet wench...unless that's what a box wrench is

    Black 1995 525i 100K Mi
    Nat1

  7. #7
    Join Date
    Oct 2004
    Location
    Honolulu
    Posts
    3,105

    Default buy more tools

    this is a combo open end and box
    Attached Images Attached Images  


    Vee ave vays of dealing vid your kind...........

  8. #8
    Join Date
    Aug 2005
    Location
    Iowa, USA
    Posts
    407

    Default

    I have done the procedure on my cat which is like yours, what helped me out was to remove the heatshield that is above the exhaust, protecting the driveshaft et al. It has 4 or 6 bolts that hold it up, once you remove those wiggle the shield towards the rear of the car, the added volume should help you in reaching the sensor and manouvering your tools

    let me know how you fare.
    1995 525i "Stefanie"

  9. #9
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default

    Quote Originally Posted by Blitzkrieg Bob
    this is a combo open end and box
    Wow, that's the best looking wrench i've ever seen!!
    I have one of those, a 1/2" that is that right size...there just isnt enough clearance to fit it

    Black 1995 525i 100K Mi
    Nat1

  10. #10
    Join Date
    Sep 2006
    Location
    Erie, PA
    Posts
    65

    Default

    Thanks much, I'll try that

    Black 1995 525i 100K Mi
    Nat1

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