Why does my car have 4 catalayic converters

[RLCHAMP]

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.

[mtccl]

Liberal democrats.

[jmo69]

I think you have 2 cats and 2 resonators and 1 O2 sensor. See illustration.
RealOEM.com * BMW E36 325is CATALYTIC CONVERTER/FRONT SILENCER

[BimmerE39]

Originally Posted by mtccl

Liberal democrats.

That's an oxymoron.

[mtccl]

Originally Posted by BimmerE39

That's an oxymoron.

or a Double Redundant

[jessiecreasy]

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.