Last I heard, and it has been a few years since I heard this, catalytic converters wear out after about 50k miles. I used to live in NJ, where they have been sniffing tail pipes on cages at the annual inspection for a many years. I never had one fail that was in a proper state of tune.
I'm pretty sure that emission systems must have a 100k warranty as mandated by federal law - cats should be designed to handle this requirement. As for CARB requiring MC smog checks - I think I found a bright side: Just think how nice it will be to ride without all those tweaked Harley's in your way! :good: :lol:
Yes, I thought of that. The point that I failed to make was that most vehicles, if running well and tuned properly, would pass the emission tests even after the cats were used up. I don't know how they do things in California, but in NJ and the counties of NY where they sniff exhaust, they set a standard of so many ppm of pollutant for a given model year regardless of make and model.
Back in the '70's most vehicles were used up after around 100k miles. Today, all of my four wheel vehicles have well over 100k and still run strong, so even if the cats are good for 100k they will not last the life of the vehicle. I expect to get at least 200k miles from a car or truck these days.
OTOH, a cat for a car is a lot less expensive to replace these days, and much less than what I expect a new one for the FJR would cost.