Truck and Bus Regulations

ARB Truck and Bus Regulations and NAR’s ARB Certified Products

Trucks and buses greater than 14,001 GVWR are subject to the ARB in use truck and bus regulations. There are two main parts to these regulations. First, these regulations mandated installation of DPFs- Diesel Particulate Filters- on older class 7-8 vehicles to allow them to continue to operate for a few more years. Initially this was also required of class 4-6 vehicles as well, but for a variety of reasons ARB rescinded that requirement. The deadlines for installing DPFs have all passed.

Secondly, these regulations placed a “drop dead date” on all 2009 and older diesel vehicles over 14,000GVWR. These dates are based on model year and mandate that these vehicles be removed from service in California by these dates. The tables below give the drop dead dates. The penalty for operating a vehicle in California past these dates is $10,000 per day.

Fleet owners have four options they must take by these dates to avoid being fined:

  1. Replace the vehicle with a 2010 or newer vehicle. This involves a large capital outlay and ARB may impose further restrictions on diesels in the future to enforce the Low Carbon Fuel Standard. There is no ROI associated with using newer diesel vehicles, only higher maintenance costs due to more complex emissions technology.
  2. Send the vehicle out of state (by sale or transfer) and reduce your California fleet. This means less ability to generate income and do business in California. For some owners this means moving the entire business out of state or closing down.
  3. Repower the vehicle with a 2010 or newer diesel engine. No vehicle or engine maker is offering an engineered package to make this happen, so owners are on their own to try and use this pathway to compliance with no guarantee the result is compliant.
  4. Update the vehicle to Natural Gas operation with an ARB certified engine. Moving to natural gas as the fuel source for the vehicle makes the vehicle no longer subject to ARB diesel regulations-forever. Additionally the vehicle is now on the credit generation side of the Low Carbon Fuel Standard and is eligible to receive income from the California Carbon Credit market.

North American Repower is the only provider of a fully engineered Natural Gas solution for MY2004 and older class 5-8 vehicles. The NAR engines are remanufactured MY2004 Navistar DT466 engines engineered to operate on natural gas and are part of a fully engineered vehicle integration package. These engines and the integration package have been tested in the lab and in field use for three years using OEM protocols prior to coming to market. The product is fully warrantied and has passed all the requirements of ARB and EPA for use in heavy duty commercial applications.

By moving to Natural Gas as a fuel, fleet owners can remove the yoke of ARB diesel compliance and participate in the “Greening” of the US fleet. By federal mandate, Energy and Fuel providers must increasingly use renewable sources for their products or purchase “Renewables Credits” to comply. Vehicles using Renewable Natural Gas- RNG- generate these credits. By moving your fleet to Natural Gas operation, you can make your fleet a source of income simply by contracting for using RNG as a fuel, turning fuel costs cost into an income source. Currently, Clean Energy fueling stations in California are dispensing 100% RNG.

Vehicles 14001 to 26,000 GVWR (Class 4-6)

Engine Model Year Schedule for Lighter Trucks
Engine Year 2010 Replacement Date
1995 and older January 1, 2015
1996 January 1, 2015
1997 January 1, 2016
1998 January 1, 2017
1999 January 1, 2018
2003 and older January 1, 2019
2004-2006 January 1, 2020
2007-2009 January 1, 2021

Vehicles 26,001 and Higher (Class 7-8)

Engine Model Year Requirements for Heavier Trucks from January 1
Pre-1994 No Requirements until 2015, then 2010 engine
1994-1995 No Requirements until 2016, then 2010 engine
1996-1999 PM filter from 2012 to 2020, then 2010 engine
2000-2004 PM filter from 2013 to 2021, then 2010 engine
2005-2006 PM filter from 2014 to 2022, then 2010 engine
2007-2009* No Requirements until 2023, then 2010 engine
2010* Meets final requirement

*Must have PM filter by January 1, 2014, if not originally equipped.