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Drive Clean requires large trucks and buses to pass regular emissions tests in order to have their registrations renewed. This applies to heavy-duty diesel-powered vehicles registered anywhere in Ontario and to heavy-duty non-diesel vehicles in the areas of southern Ontario where light-duty testing is required.

Heavy-duty vehicles are required to undergo emissions testing every year. Vehicles need a test for registration renewal beginning at seven years of age.

As a consumer-protection measure, an emissions test pass is required for an ownership transfer for vehicles with a model year older than the current calendar year.

In 2005, we introduced an incentive that encourages good vehicle maintenance by giving heavy-duty diesel vehicles operators the opportunity to have their vehicle tested every two years, instead of annually. For more information please refer to the heavy-duty FAQ page.

Vehicles exempt from Drive Clean testing requirements:

• Vehicles designated as “Historic” under the Highway Traffic Act
• All hybrid vehicles (those powered by a combination of internal combustion engines and electric motors)