California OBDII Part Number Look Up

To properly identify the correct replacement catalytic converter for your vehicle, you will need to locate the Engine Family Number (EFN) or Test Group. This number is usually located under the hood on the Vehicle Emission Control Information label. Check out the sample image below.

Once you locate the EFN, you will need to find that number in the appropriate Executive Order to verify that the catalytic converter is correct for the desired application.