Alternate Fuel Retrofit Systems (Aftermarket)
This page last reviewed December 18, 2014
Certification of Alternative Fuel Retrofit Systems
|California regulations prohibit the
conversion of emission-controlled vehicles with retrofit systems to
operate on an alternative fuel, such as natural gas, propane, or
ethanol, in lieu of the original gasoline or diesel fuel unless the
retrofit systems have been evaluated and certified by the Air Resources
Board (ARB). The certification of an alternative fuel retrofit system
must be obtained by its manufacturer. Certification is issued by ARB
once the manufacturer demonstrates compliance with the emission,
warranty, and durability requirements. A manufacturer is defined as a
person who manufactures or assembles an alternative fuel retrofit
system for sale in California. An individual who wishes to convert a
vehicle for personal use does not fall under this definition and cannot
certify a retrofit system in California.
The United States Environmental Protection Agency (U.S. EPA) streamlined its rules for alternative fuel converters using a 3-tier approach based on vehicle age/useful life (published April 8, 2011). This has prompted numerous inquiries regarding their applicability in California. As clarified in U.S. EPA guidance letter CISD-10-24 (Q&A # 9), California’s requirements for alternative fuel converters are different than U.S. EPA’s requirements. Revisions to California’s Alternative Fuel Conversion regulation and test procedures were approved by the Board on September 26, 2013. 2003 model year and earlier vehicles were not affected by these changes. The revisions provided for streamlining of the conversion approval process for 2004 Model year and later Light Duty (LD) vehicles/Heavy Duty (HD) engines. Small volume manufacturers were given some additional relief which sunsets after the 2017 model year.
What's New: New Alternate Fuel Retrofit System Certification Procedures
Approved Alternate Fuel Retrofit Systems
Individuals interested in converting their vehicles to operate on an
alternative fuel must ensure that the alternative fuel retrofit systems
used for their vehicles have been certified by ARB. Lists of
certified retrofit systems for various vehicle makes and models are
available online, as follows:|
Procedures for Alternate Fuel Retrofit System Certification
|The following are the procedures for certifying retrofit
systems designed to convert on-road vehicles and engines to
operate on alternative fuels:
To obtain additional information on certification requirements of Vehicles Converted to Alternate Fuel Vehicles, please contact Jackie Lourenco, Chief New Vehicles and Engine Programs Branch at (626) 450-6152 or firstname.lastname@example.org.
For information on Hybrid Vehicles Converted to Plug In Vehicles, please contact Antonio Martino, Manager Aftermarket Parts Section at (626) 575-6848 or email@example.com.
For hydrogen, biodiesel or non-hybrid to hybrid questions, please contact Antonio Martino, Manager Aftermarket Parts Section, at (626) 575-6848 or firstname.lastname@example.org.