W220 S320 Rattling Catalytic Converter ??

Discussion in 'General Discussion' started by Bladerunner2125, Jul 27, 2016.

  1. Bladerunner2125

    Bladerunner2125 Active Member

    Messages:
    79
    Joined:
    Apr 21, 2012
    Car:
    S320 W220 2002
    2002 S320 under floor central Cat has started rattling are there any aftermarket options I could use to replace the Original cats going to replace both central ones at the same time pipe diameter at each side of the Cat is 55mm, noticed looking at them that the in pipes are not perfectly in line with the out pipes so some fettling may be required, there are no O2 sensors just before or after the middle Cats so should not throw up any EML lights? anyone done this modification to their W220.
     
  2. WG M-B

    WG M-B Auhorised Forum Sponsor Authorised Forum Sponsor

    Messages:
    1,898
    Joined:
    May 26, 2011
    Location:
    N/W london
    Car:
    C63 Wagon in black
    Try Bm catalysts
    They are nowhere near as good as the original, but will get you out of trouble.
    Alternatively you could do away with them?
     
    1 person likes this.
  3. OP
    OP
    Bladerunner2125

    Bladerunner2125 Active Member

    Messages:
    79
    Joined:
    Apr 21, 2012
    Car:
    S320 W220 2002
    Just an update, had both the middle cats internals removed from the top so cannot be seen from below, no rattles now and car runs just as well, just a slight change in the Exhaust Tone on start up.
     
    1 person likes this.

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