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DEC catalytic converters

I replaced both of mine on my 98 540i last fall. I bought DEC brand. VERY bad experience! 1st of all, they were NOT a 'direct fit' as advertised and required some cutting to get it to fit. 2nd of all, it began rattling after about 5k miles and eventually sounded worse than the original ones. I called DEC and spoke to a technician that insisted that it was my fault due to my car running rich. He would not honor any warranty. The only codes I had before installing the DECs were for catalyst efficiency, not rich mixture. DEC did not provide any warning about rich mixture in the installation instructions...wait there were not any instructions anyway! I do not think my car runs rich and I have no codes to that effect. The oxygen sensors had been replaced recently before the DEC cats were put on, also. I feel I got ripped off. Beware of $800 DEC catalytic converters.
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#194657 Review #194657 is a subjective opinion of poster.
Orlando, Florida



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