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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.
