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California Diesel Emissions Rules Dramatically Reduced

Compliance Schedule for Medium Duty Trucks

Engine Year

Replacement Date
(January 1)

1995 and older

2015

1996

2016

1997

2017

1998

2018

1999

2019

2000

2020

2001

2020

2002

2020

2003

2020

2004

2021

2005

2021

2006

2021

2007

2023

2008

2023

2009

2023

*Some trucks have engines with a different year model than the vehicle. Every engine should have a label with its year model.


In December 2010, the California Air Resources Board (CARB) made some big changes to diesel emissions rules for medium duty diesel trucks.

FORTUNATELY, THESE CHANGES SIGNIFICANTLY REDUCE THE BURDEN TO COMPLY WITH CARB’S DIESEL TRUCK AND BUS REGULATION.

Here is what you need to know:

  • Medium duty diesel trucks (14,001 – 26,000 lbs. Gross Vehicle Weight) will no longer need diesel particle filters installed.
  • Starting in 2015, most medium duty diesel trucks will eventually need to be replaced (i.e. not used in California) when their engines* become 20 years old. See the table below for specific replacement dates.
  • Diesel vehicles 14,000 lbs.GVW and under are not subject to any of these regulations.
  • Gas-powered vehicles are not subject to any of these regulations.

Click here for a link to the California Air Resources Board’s fact sheet.