The 25-Year Import Rule, Explained
The "25-year rule" is the fact that matters most when importing a JDM car. It is the reason a Nissan Skyline GT-R that was never sold in the United States can be parked legally in an American driveway. This guide explains exactly what the rule is, how the 25 years are counted, and how it differs from the two things people most often confuse it with: the EPA's separate emissions cutoff and the Show or Display program.
The short version: under federal law, a vehicle that is at least 25 years old is exempt from the Federal Motor Vehicle Safety Standards (FMVSS) and can be imported permanently, even if it was never built for the US market. Age is counted from the month of manufacture, so a car built in March 2001 becomes eligible in March 2026.
What does the 25-year rule actually say?
The Imported Vehicle Safety Compliance Act of 1988 (49 CFR Part 591) blocks vehicles not built to US safety standards, but exempts any motor vehicle 25 or more years old. Such a car falls outside the Federal Motor Vehicle Safety Standards and can be imported by nearly anyone, no Registered Importer or DOT compliance bond needed.
On the NHTSA HS-7 Declaration filed at the border, this is the box an importer checks to claim the exemption. It is a rolling window: every month, another month's worth of cars crosses the 25-year line and becomes importable for the first time.
How are the 25 years measured?
The clock runs from the month and year of manufacture, which is stamped on the build plate usually found on the door jamb — never from the model year. Counting the model year is the classic first-timer error, because a brochure's model year can sit ahead of when the car was actually assembled.
A worked example: a car built in March 2001 becomes eligible in March 2026, not on January 1 of 2026. If you are buying close to the line, the build month decides whether the car can ship now or has to wait.
How is the EPA's 21-year rule different?
They are two separate rules from two agencies. NHTSA governs safety at a 25-year threshold; the EPA governs emissions at a lower 21-year threshold, and the emissions exclusion only holds when the engine is original or factory-equivalent. Conflating the two thresholds is what strands cars at the port.
- NHTSA (safety): 25 years. Exemption from FMVSS.
- EPA (emissions): 21 years. A vehicle at least 21 years old is excluded from federal emissions requirements, but only if its engine is original or equivalent to what the factory installed. An engine swap can disqualify an otherwise old-enough car.
Because the safety bar (25 years) sits higher than the emissions bar (21 years), a stock-engine car that clears 25 years almost always satisfies both at once. The EPA threshold mainly matters for the narrow case of importing an engine on its own, or a heavily modified car.
What is Show or Display — and what is it not?
Show or Display is a distinct NHTSA program, not the 25-year rule, though the two are constantly confused. It lets a handful of historically or technologically significant cars still under 25 years old enter early, but only with NHTSA approval and a hard cap of 2,500 driving miles per year. The conditions are strict:
- The vehicle must be of genuine historical or technological significance, and NHTSA has to approve it. The agency keeps a running list of approved and rejected models.
- The car may be driven no more than 2,500 miles per year, and NHTSA can ask to verify the odometer.
- It still has to satisfy EPA emissions rules, which usually means it must also be at least 21 years old or otherwise compliant.
In other words, Show or Display is a narrow, mileage-capped exception for significant cars that have not yet turned 25. The ordinary 25-year route has no mileage cap and no significance test. Most JDM buyers will use the 25-year route, so if a car has crossed that line, Show or Display is irrelevant to it.
When does each Skyline generation qualify?
Each generation clears the line in staggered waves as the rolling window advances month by month. The R32 (built 1989 to 1994) opened up across 2014 to 2019, the R33 (1995 to 1998) followed from 2020 to 2023, and the R34 (1999 to 2002) is opening across 2024 to 2027.
The approximate windows, which you should always confirm against the individual car's build month:
| Generation | Built | First eligible |
|---|---|---|
| R32 GT-R | 1989 to 1994 | 2014 to 2019 |
| R33 GT-R | 1995 to 1998 | 2020 to 2023 |
| R34 GT-R | 1999 to 2002 | 2024 to 2027 |
This is why the R34 became a headline import only recently: 1999 cars opened up in 2024, 2000 cars in 2025, and the rest follow year by year. For a deeper buyer's guide, see buying an R34 Skyline GT-R.
What does the rule mean for buyers?
In practice, the rule rewards a little diligence up front. Confirm a car's build month before committing, keep the engine stock or stock-equivalent to protect the EPA path, and lean on a specialist who tracks build dates and files the customs, DOT, and EPA paperwork. Those three habits prevent almost every port surprise.
- Check the build plate before you fall in love with a car. A few months can be the difference between shipping now and waiting a year.
- Keep the engine honest. A stock or stock-equivalent engine keeps the EPA path simple.
- Work with a specialist who tracks build months. The importers in this directory verify auction sheets and build dates and handle the customs, DOT, and EPA paperwork so a car clears without surprises. See how we vet the shops we list, or browse Skyline & GT-R specialists.
Browse importable models: see live listings for the R34 Skyline GT-R, the Toyota Supra, and the Mazda RX-7, or browse every model in the directory.
Official references
- NHTSA: Importing a Vehicle (HS-7 Declaration, 25-year exemption, Show or Display)
- EPA: Publications and Forms for Importing Vehicles and Engines (Form 3520-1, 21-year exclusion)
This guide is general information and does not constitute legal or customs advice. Rules and thresholds change, so confirm current requirements with a licensed customs broker before importing.