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Failed catalystic converter

Tiny
ERAHME
  • MEMBER
  • 2003 BMW 325I
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 76,000 MILES
HOW I KNOW IF THE CATALYST CONVERTER IN MY BMW 325I 2003 IS BAD?
Saturday, May 28th, 2011 AT 9:02 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Get a 5gas analysis test this will tell if its scrubbing the gases or not-
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Saturday, May 28th, 2011 AT 9:30 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Also, your car's PCM monitors this for you. It will set a code PO420 or PO430 for the other side.
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Saturday, May 28th, 2011 AT 11:46 AM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
And report back here straightaway with the readout numbers from the 5 gas analysis.
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Tuesday, July 5th, 2011 AT 9:38 PM

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