How Long Does a Catalytic Converter Last? | YourMechanic Advice

How Long Does a Catalytic Converter Last?

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Average rating from 185 customers who received a Catalytic Converter Replacement.

The catalytic converter converts pollutants in the exhaust system into less toxic pollutants by using a redox reduction method. The catalytic converter is located on the exhaust system of your vehicle, and is essential to controlling your vehicle’s emissions. It basically burns the emissions and converts them into water vapor and oxygen. The main emissions of your vehicle include nitrogen gas, carbon dioxide (CO2), water vapor( H2O), carbon monoxide (CO), hydrocarbons (VOC), and nitrogen oxides (NO and NO2).

Most modern vehicles are equipped with a three-way catalytic converter. The first stage of the catalytic converter is the reduction catalyst. In this stage, rhodium and platinum reduce the nitrogen oxide emissions. The second stage is the oxidation catalyst. Here, the unburned carbon monoxide and hydrocarbons are reduced by burning them over palladium and platinum catalyst. The control system is the third stage and it monitors the exhaust stream. It uses this information to control the fuel injection system through an oxygen sensor. The sensor will send information to the engine about how much oxygen is in the exhaust. If there is too much or too little oxygen, the engine’s computer can increase or decrease the amount by adjusting the air to fuel ratio. This ensures there is enough oxygen in the exhaust to make certain the oxidation catalyst can burn the carbon monoxide and hydrocarbons effectively.

The catalytic converter works at an extremely high temperature, so it is not uncommon for it to fail. For example, a misfiring engine system can cause the catalytic converter to overheat and become damaged. In addition, exhaust can become trapped in the catalytic converter, which creates back pressure and causes the engine to stop running. This will cause your vehicle to stall while you are driving. The catalytic converter can also be damaged due to impact from road debris. Watch for the following signs that indicate your catalytic converter is failing:

  • Poor fuel economy
  • Vehicle is performing poorly, such as stalling while driving or a jerking feeling
  • Misfiring engine
  • Check Engine Light
  • Rotten egg smell

Since the catalytic converter can become damaged or fail over time, the catalytic converter may need to be replaced.


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Recent Catalytic Converter Replacement reviews

Excellent Rating


YourMechanic Catalytic Converter Replacement Service

Average Rating

4.9/5

Number of Reviews

185

Rating Summary
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John

26 years of experience
630 reviews
John
26 years of experience
Ford Taurus - Catalytic Converter - Houston, Texas
I have used Johns several times for various repairs/diagnosis. Each time he has arrived at or before the scheduled time. He is very knowledgeable about auto repairs and goes about them very professionally. I respect everything that he has done for me, and will always use him for any future repairs. Thanks John!
Ford F-150 - Catalytic Converter - Pearland, Texas
John communicated with me leading up to the appointment and was just what you wanted. He did a great job and represented his company well. Would give him a 10!

Mazyar

7 years of experience
255 reviews
Mazyar
7 years of experience
Lexus LS430 - Catalytic Converter - Duluth, Georgia
I didn’t know what to expect today getting my car fixed. He showed up on time , finished in good timing., and also did a great job. I would recommend him..
Lincoln Navigator - Catalytic Converter - Alpharetta, Georgia
Mark came on time and did exceptional job in replacing my catalytic converters - a job hard enough even for a shop. this is the second time I am using Mark's services and he proved himself as a reliable and knowledgeable mechanic

Marvin

5 years of experience
71 reviews
Marvin
5 years of experience
Acura Integra - Catalytic Converter - North Las Vegas, Nevada
Marvin was on time, very knowledgeable and communicated to me why he wasn't able to do the repairs needed. So I was able to move forward on my repairs. Sincerely, Cindy Mayo CXMayo.cm@outlook.com

Jeshua

6 years of experience
119 reviews
Jeshua
6 years of experience
Ford Focus - Catalytic Converter Replacement - Bradenton, Florida
Jeshua was very courteous, professional and knowledgeable. I was apprehensive in using this yourmechanic.com, but if Jeshua indicative to what I can expect then I'll be using your service from here on out.

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