DMV Compliance Verification
On January 1, 2020 heavy-duty diesel vehicles that are not in compliance with the Truck & Bus regulation will be unable to register their vehicle with DMV. Visit TruckStop to learn more.
Truck and Bus Regulation
The Truck and Bus regulation has been in effect since December 2008, as of January 1, 2023, all diesel-powered vehicles operating in California, with a gross vehicle weight rating over 14,000 lbs. must have a 2010 or newer engine and emission system with few exceptions. Affected vehicles that do not comply with the regulation will have their registration denied by the Department of Motor Vehicles (DMV). Please email questions to trucrs@arb.ca.gov, include your Truck Regulations, Upload and Compliance Reporting System (TRUCRS) identification number, vehicle identification number(s) (VIN), and a detailed description of your specific situation.
More about this program
Official California Diesel Truck Information
Check compliance status
Answers to common questions