Colorado Department of Revenue
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Emissions Waiver

What is a waiver?


After qualification and approval by our office, a waiver allows you to register a vehicle without complying with the required levels of emissions for carbon monoxide (CO), hydrocarbons (HC), or oxides of nitrogen (NOx).  If a certification of emissions waiver is granted, it is good for one emissions cycle.




Type of Waiver


Reasons Waiver Request Will Be Denied



Repair Waiver  – Gasoline Powered Vehicle


1968 and newer gas vehicles: $715 in emissions related repairs



Visible smoke 


Missing or tampered emissions equipment


Failing gas cap (evaporative systems)



Can be granted when all requirements are met


1967 and older gas powered vehicles: $75 in emissions related repairs


Economic Hardship Waiver – Gasoline Powered Vehicle


No minimum repairs necessary

Vehicle owner must be receiving assistance from an established and approved public assistance program

Vehicle must be the sole means of transportation



Visible smoke


Missing or tampered emissions equipment  

Failing gas cap (evaporative systems)



Can be granted only once per vehicle


Repair Waiver – Diesel Powered Vehicle


Light-duty (14,000 GVW or less): $750 in emissions related repairs


Malfunction indicator light (MIL)

Missing or tampered emissions equipment  



Can be granted when all requirements are met


Heavy-duty (14,001 GVW or more): $1500 in emissions related repairs




 How do I request a waiver?


Have a current failed emissions test.



For a repair waiver, you must have a sufficient amount of repairs (see table above) performed and paid for, and get a confirmatory test that shows the vehicle is still failing after repairs.



Review the requirements in the table above for your vehicle and your situation.



If you think you may qualify, call us at (303)205-5603.



What counts as an emissions repair for waiver purposes?


Only labor charged by a professional mechanic (someone who performs work as part of a licensed business and conforms to the Garage Repair Act) will be counted towards repair waiver limits.


Emission control components include: oxygen sensor, catalytic converter, thermal reactor, EGR valve, fuel filler cap, evaporative canister, PCV valve, air pump, distributor, ignition wires, coil, and spark plugs. The cost of any hoses, gaskets, belts, clamps, brackets or other accessories directly associated with these components may also be applied to the waiver limit.


In addition, certain repairs to fuel injection systems, carburetors and internal engine components may apply.