STEP 1 – LOCATE THE VEHICLE EMISSIONS CONTROL INFORMATION LABEL
To determine which catalytic converter to use on a vehicle, it is necessary to determine the specific emissions system installed by the OE manufacturer. This information is provided on the car's VEHICLE EMISSIONS CONTROL INFORMATION (VECI) label located in the engine compartment in a visible location – usually on the hood underside, strut tower, radiator support, fan shroud, or firewall.
STEP 2 – DETERMINE THE EMISSIONS CERTIFICATION
A vehicle is a California Emissions Certified model if the VECI label references California, 50-State, CARB, or ARB. This is vital information if regulations in your state mandate replacement converters be CARB compliant.
STEP 3 – LOCATE THE ENGINE FAMILY NUMBER
The EFN, also referred to as the Engine Family Number, Emission Family Number, or Test Group Number, is prominently located on the VECI label, along with other important emissions specifications. This information is vital when looking up parts in the application catalog to ensure proper fit and when navigating state-mandated aftermarket replacement converter regulations.
All OBD applications in the WALKER® CALCAT® CARB-COMPLIANT CATALOG reference an EFN. Be sure to verify your EFN to avoid misapplication of the replacement catalytic converter. If the label is missing, it is necessary to contact the OE dealer for the information, or to order a new Emission Control Information Label.
Determining the proper replacement converter for a particular vehicle takes a little research. The WALKER CALCAT CATALOG specifically indicates which converters are legal for use in CARB-compliant states (California, Colorado and New York) and on which vehicle models they can be installed.
SEARCH BY EXECUTIVE ORDER NUMBER - CALIFORNIA
Search California Air Resource Board's Aftermarket Converter Database by vehicle or by executive order number with this handy SEARCH TOOL.
The content in this article is for informational purposes only. You should consult with a certified technician or mechanic if you have questions relating to any of the topics covered herein. Tenneco will not be liable for any loss or damage caused by your reliance on any content.