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Which counties require a passing emissions test to register a vehicle?
2020 Diesel Emissions Requirement
(GVWR up to 26000 lbs.)
Model Year
Heavy-Duty Diesel
Frequency of Test
Testing Fee
2020
Exempt
n/a
2019
2018
2017
Renewal are Exempt
Need test if transfer of ownership
Rates vary per diesel testing center
2016
Need test
Every two years
2015
2014
2013
2011
1988 – 2011*
Annually
1976 - 1988
With Collector Plates
Every five years
Without Collector Plates
1976 or newer Grandfathered**
1975 and older
1975 and older without Collector Plates
*2008 Transition from biennial to annual testing is based on the MSO (Manufacturer Statement of Origin) date of the vehicle. See local County DMV for more information.
** Vehicles model year 1976 or newer that have been registered as a "collector's item" prior to September 1, 2009, and the registration has never lapsed or expired or had a change of ownership.
2020 Diesel Emissions Requirements
(GVWR 26000 lbs. or more)
2012*
Need Test
1988 - 2011
1976 – 1988
*Transition from biennial to annual testing is based on the MSO (Manufacturer Statement of Origin) date of the vehicle. See local County DMV for more information.
Diesel emission testing facilities charge up to one-hour of the posted labor rates, so fees will vary. Contact the specific station for fees.
