my experience with aftermarket cats failing 'early' is related to the following issues, many times both.
the cat is a cheapy 'universal fit' that is too small and fits every car a little bit.
underlying issues of poor driveability/engine performance are not addressed to correct the issue at hand that killed the cat in the first place.
most emissions repair shops can actually test the cat for oth efficientcy as well as oxygen retention. both of which are factors in grading the performance of the cat.
the rear o2 sensor should also be checked to verify proper operation.
it's sole purpose is to monitor the cat, and will not affect anything with the way the car drives. it will also not kill the cat.
i have a 'non oe' cat on my e36 and have no issues with performace or emissions. (in fact it was for a ford....)
stick with reputable catalytic converters and you should be fine.
df |