Is a Kei Truck Street Legal in Montana?

What does Montana law say about Kei Trucks?

Montana treats a Kei Truck like any other light vehicle. Nothing in its statutes targets Kei Trucks or mini trucks, and the title law gives the Motor Vehicle Division (MVD) a short list of reasons to refuse a title. Under MCA 61-3-219, the department may refuse when a fee is unpaid, or when it has reasonable grounds to believe the person applying does not own the vehicle, the application is false, a required document or piece of information is missing, or the vehicle is reported stolen. Where the vehicle was built, and which country's safety rules it met, is not on that list.

Montana also does not inspect vehicles on a schedule, for safety or for emissions. Once the paperwork clears, plates follow. See where Montana sits among all states on the Kei Truck law map.

Where can you drive a Kei Truck in Montana?

Any public road. Montana law sets no Kei-specific speed limit, road class or interstate ban for a registered vehicle. The practical limits are distance and speed: towns are far apart, and a 660 cc truck held at highway speed for long stretches works hard. Most owners use theirs on ranch roads, county roads and around town. Our off-road guide covers 4WD and low-range use on rough ground.

What does the Montana MVD need for an imported Kei Truck?

The MVD Title Manual (August 2026) covers foreign vehicles, Canadian and otherwise, in one section. For a Japanese truck, plan on:

• Form MV1, the application for a Montana title
• The foreign ownership document, signed off by the registered owner. On a Kei Truck import, this means the Japanese export certificate.
• The HS-7, the US Department of Transportation (DOT) declaration of safety-standard status. The 25 years run from the date of manufacture, so have proof of the build date if it is not on a label.
• The customs entry document from US Customs and Border Protection. Form 7501 is the only one accepted, and an original, photocopy or fax is fine.
• English translations on a separate page, attached to the original, with a signed declaration from a translator who has no interest in the truck

Two warnings from the manual. An HS-7 marked "export only" cannot be titled or registered. The separate gray market chapter, with its bond, conversion work and a release that typically takes three to six months, is for nonconforming vehicles that need DOT and EPA releases. Kei Trucks old enough to import are declared under box 1 on the HS-7 and skip that chapter.

Confirm the current list with the county treasurer's office ahead of shipping. Our guide to importing a Kei Truck explains each federal form, and the 25-year rule page covers build dates.

1. Collect the ownership papers

   Keep the Japanese export certificate, released by the registered owner, and any bills of sale that connect that owner to you.

2. Translate them properly

   Have each Japanese document translated into English on a separate page with a signed translator's declaration, and attach the original. The translator cannot have an interest in the truck.

3. Assemble the federal forms

   Include the HS-7, box 1 marked for the 25-year exemption, plus proof of the build date if it is not on a label, and the CBP 7501. A copy or fax of the 7501 is acceptable.

4. Apply at the county treasurer

   File Form MV1 with the papers above, ask whether a Level 1 VIN inspection on form MV20 is needed, and pay the title fee.

5. Choose annual or permanent plates

   Pick annual registration ($28 base for a light vehicle 11 years or older, plus county tax and the truck weight fee) or permanent registration ($87.50 plus five years of county tax and weight fees). Insure it to at least 25/50/20.

What does a Kei Truck cost to register in Montana?

The base annual fee for a light vehicle 11 or more years old is $28 under MCA 61-3-321, plus your county's local option tax and the truck weight fee. Owners of vehicles that old can instead choose permanent registration under MCA 61-3-562: a one-time $87.50 fee plus five times the local option tax, five times the truck weight fee and a few smaller charges. After that, no further registration fees are due until the truck changes hands.

Insurance minimums under MCA 61-6-103 are $25,000 for one person's injuries, $50,000 when two or more people are hurt, and $20,000 for property damage.

With no inspection, condition is up to you. Long winters punish a tired battery and dim headlights, and our maintenance guide lists the first-service items for a newly landed truck.

What about Montana LLC registration for out-of-state owners?

Montana lets business entities own and register vehicles, and some people in other states register vehicles through Montana LLCs to sidestep their home state's taxes or rules. Do not treat that as a Kei Truck workaround. A Montana plate does not override the rules of the state where you drive, so if your home state refuses Kei Trucks, the Montana registration changes nothing there. Registration and garaging rules follow where the truck actually lives, and an insurer can deny a claim when the garaging address on the policy is false.

States are enforcing this. In March 2026, California's tax agency reported hundreds of buyer investigations and dealer audits tied to Montana registrations. If someone pitches the idea, talk to an attorney in your home state first.