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: Vehicle cranks but doesn't start.

Hey there. It looks as if you've thrown everything at it except the kitchen sink. Sometimes simplifying the search is the best course of action in regards to keeping the engine running. This would narrow it down to air, fuel,...

Q: Q: Car shakes

The engine computer would need to be scanned to see if the engine is misfiring. That would lead to a possible coil, or spark plug failure. Depending on your car's mileage, there may be a coil and plug issue. I...

Q: Bad fuel pump? 2004 BMW X3

Hi - short answer is "No: a fuel pump problem will not cause a camshaft position sensor problem". But, we all know Murphy's 2nd or 3rd law says that 2 things can fail close enough together to make us believe...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...