If the vehicle you are planning on purchasing from the United States and Importing into Canada, that is 15 years old or older, you are not required to pass the RIV program that regulates Canadian vehicle safety specifications. Thats right! No vehicle modifications, no fees. If you are planning on picking the vehicle up with a trailer, importing your 15 year old + vehicle should be basically hassle free.
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You will have to produce a bill of sale, the vehicles title and pay your provincial taxes when you go to register it in your province