Results 1 to 3 of 3

Thread: Are the upstream & downstream o2’s the same ?

  1. #1
    Join Date
    Sep 2021
    Location
    Los Angeles, California
    Posts
    96
    My Cars
    1994 BMW 325iC

    Are the upstream & downstream o2’s the same ?

    I know it’s a really stupid question, but I keep checking real oem and searching part numbers & they always come back with both the upstream/downstream o2 (more upstream then latter)

    I need to replace my downstream and I’m lost on what part will actually work (given I’m not trying to spend $120+ on an o2 lol)

  2. #2
    Join Date
    Dec 2013
    Location
    People's Republic of MD
    Posts
    2,291
    My Cars
    22 doors and 4 tops
    Yes, but longer wires

  3. #3
    Join Date
    Apr 2005
    Location
    ATL
    Posts
    164
    My Cars
    '91 325i
    Yes, they are all identical. Be mindful to plug them into the correct spots (don’t mix up the banks).
    Harrison Motorsports
    Motion Control Suspension
    Daytona M3

Similar Threads

  1. 2 - NTK E36 downstream O2 Sensors post cat. - SOLD
    By RomoGuy in forum Engines, Performance Parts & Software
    Replies: 2
    Last Post: 02-17-2014, 09:29 PM
  2. Pre cat o2 sensor same as post cat... ? According to NGK
    By bay707 in forum 1992 - 1999 M3 (E36)
    Replies: 9
    Last Post: 10-13-2012, 01:44 PM
  3. New Cat's, New O2 sensors same error 1213
    By TheJayP in forum 1995 - 2001 (E38)
    Replies: 26
    Last Post: 10-01-2011, 02:26 AM
  4. code 1221 ... "upstream" or "downstream" o2 sensor??
    By txaviator in forum 1991 - 1999 (E36)
    Replies: 5
    Last Post: 11-15-2009, 11:32 PM
  5. E39 528i O2 Sensor: same for front and rear?
    By ///M297 in forum 1988 - 1996 (E34)
    Replies: 3
    Last Post: 03-13-2006, 10:10 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •