Why does my car have 4 catalayic converters - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 04-11-2009, 03:41 PM
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Why does my car have 4 catalayic converters

Ok well i just took my car to Walt's muffler shop and he says 1 out of 4 cats are working and that it will cost me 1g to replace 3 of them. WHY DO I HAVE 4 CAT CONVERTERS? my car is a 1994 325is.
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#2 (permalink) Old 04-11-2009, 05:01 PM
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Liberal democrats.

2002 BMW 330XI
1988 Porsche 944
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#3 (permalink) Old 04-11-2009, 09:42 PM
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I think you have 2 cats and 2 resonators and 1 O2 sensor. See illustration.
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#4 (permalink) Old 04-11-2009, 11:48 PM
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Quote:
Originally Posted by mtccl View Post
Liberal democrats.
That's an oxymoron.
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#5 (permalink) Old 04-12-2009, 09:46 AM
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That's an oxymoron.
or a Double Redundant

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#6 (permalink) Old 04-16-2009, 04:25 AM
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Another way to test is to use a non contact thermometer. Check temp before the cat and after the cat. If cat is working properly,temp in rear will be higher than temp going into the cat.
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