Q: How often do you replace a catalytic converter?

asked by on

Replaced factory original cat with aftermarket part at 180000.. Car failed emissions in California after 10 000 miles (just over 2year warranty) and was replaced with another cat and was 1 point away from failing after another 10000 miles. Mechanic recommends replacing it again. Is this what I can expect because the car is so old?

My car has 200000 miles.
My car has an automatic transmission.

This would all depend on the quality of the catalytic converter and whether or not the engine is running rich. If the catalytic converter installed was not of OEM quality, this can be part of the reason that it did not last. It is also possible that the engine is running rich. This means that excess fuel is being delivered to the engine. If this is the case, the catalytic converters can foul out much faster than normal. If this is the case, I would recommend having your vehicle inspected for a rich running condition.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. How often do you replace a catalytic converter?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Does the power steering pump come with the belt, hoses and steering rack? 2000 BMW 323ci

Q: Throttle position sensor light on

For many vehicles, regardless of manufacturer, there is the need to do a "re-learn" sequence (after replacing the TPS or a battery) so the TPS and transmission will work smoothly. You may have to drive the vehicle for a bit...

Q: I have a 2001 BMW 325i. It overheated, engine shut down. When cooled down (24 hours), while water poured in the reservoir I could

I'm not clear on where you see your leak, but if it is in the radiator tank itself, that will mean you at least need a radiator. If the car ran hot until it shut off, there may have been...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...