California Air Resources Board Information


The California Air Resources Board (CARB) is the “clean air agency” that protects public health, welfare, and ecological resources through the reduction of air pollutants. CARB is the enforcement body when it comes to diesel-powered medium-duty trucks in California, and one of their primary duties is to define vehicle emissions standards. The state of California has established regulations to meet these standards.


These regulations no longer allow some diesel-powered vehicles to be operated on California roadways. If you own a business and operate older model diesel vehicles, you may need to replace your truck due to these regulations. If your truck is out of compliance, CARB can place a DMV registration hold on your vehicle.

Header Image gears
Page Content

What does this mean if you own an older Medium-Duty Truck?

First and foremost, now is a great time to explore upgrading to a newer model truck. The experts at Ry-Den can help you get behind the wheel of a new or used truck for less than you may think. Don’t wait until your current diesel truck is out of compliance.

Class 4-6 California Air Regulation Board Compliance

As of January 1, 2021, any diesel truck with a manufacture year of 2006 or older, will no longer be in compliance with the CARB Diesel Truck Regulations. All Class 4-6 diesel powered vehicles must be equipped with a 2010 or newer engine model year (EMY). View the table here to determine when your vehicle needs to be replaced.

The sales specialists at Ry-Den Truck Center can help you get behind the wheel of a new or used medium-duty truck to drive your business further.

CARB for lighter vehicles



Class 7-8 CARB Compliance

All Class 7-8 diesel powered trucks with a manufacture date of 2004 or older must be completely replaced or have a 2010 or newer EMY or they will not meet compliance with new regulations.

CARB for Heavier Vehicles


Call today to see how Ry-Den can help you meet these new regulations.


For more information call 1-866-6DIESEL (866-634-3735) or visit arb.ca.gov/truckstop.