S320 w221 O2 sensor location

Discussion in 'Engine' started by Kay187, May 28, 2018.

  1. Kay187

    Kay187 Member

    Messages:
    55
    Joined:
    Aug 31, 2012
    Location:
    Scotland
    Car:
    S-class 320 CDI
    Hi, my w221 has been running a little rough and I get a bit of smoke now and again when I put the foot down. I scanned codes using my icarsoft and have the bank 1 sensor 1 coming up, can someone point me to the location of this plz? Also any DIY for this and is it a difficult job?

    Thanks.
     
  2. AMGeed

    AMGeed MB Club Veteran

    Messages:
    12,036
    Joined:
    Nov 1, 2008
    Location:
    Bournemouth/Poole Dorset
    Car:
    2014 E63 Biturbo
    You have to remove the undertray, then follow the exhaust up toward the manifold where you will see the primary cats ( one each side on a 320cdi?) the O2 sensor is tapped into the exhaust at this point. If you don't mind working under the car on jackstands its a DIY job. (Please make sure the car is correctly supported and not just on the car jack.)
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.