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Can Off-Road Vehicles with Additional Fuel Tanks Pass Annual Inspection?

2 Answers
SpencerAnn
09/05/25 5:58am
Off-road vehicles with additional fuel tanks cannot pass the annual inspection. The installation of an auxiliary fuel tank on a motor vehicle constitutes an alteration of the vehicle's original specifications, which does not comply with the safety conditions for motor vehicle operation. Vehicles equipped with auxiliary fuel tanks must have them removed and the original fuel system restored before they can undergo the annual inspection. Legal vehicle modifications include the following: 1. Replacing wheels of the same size: Wheels can be replaced without changing the vehicle's length, width, or main structure, but the wheel size must match the original factory specifications and must not protrude beyond the fenders. 2. Changing the vehicle's color: National laws allow individuals to change the color of their vehicles. However, if the color change covers more than 30% of the vehicle's surface, the owner must visit the vehicle management office within 10 days to take new photos and apply for the change. The color cannot be changed to official service colors (such as those used by police cars, fire trucks, or ambulances), nor can it be changed to mirror-reflective or "chameleon" colors. 3. Installing roof racks: The installed roof rack must not alter the vehicle's length, width, or main structure. Additionally, the height of the rack must not exceed 30 cm, and it must be securely fastened. 4. Adding side steps: Side steps can be installed, but they must not change the vehicle's length, width, or main structure. 5. Replacing the grille or bumper: Vehicles are allowed to replace the grille or bumper without changing the vehicle's length or width. 6. Modifying the interior: Interior modifications are more lenient compared to exterior changes. Examples include installing carbon fiber panels, a suede steering wheel, upgrading the audio system, or adding leather seats. 7. Modifying headlights: As long as the color is not changed, the color temperature is below 6000K, and the headlights are equipped with bi-xenon lenses without glare issues that could affect oncoming drivers, such modifications are legal and will pass the annual inspection. 8. Upgrading the braking system: This includes replacing performance brake pads, discs, or even calipers. Upgrading the braking system within reasonable limits not only enhances the vehicle's appearance but also significantly reduces braking distance and improves pedal feel.
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SanKingston
09/17/25 6:21am
As an experienced off-road enthusiast, I have a lot to say about installing auxiliary fuel tanks. Auxiliary tanks can significantly extend your driving range, making long-distance trips or remote area road trips much more convenient. However, passing the annual vehicle inspection largely depends on whether your modifications comply with regulations. Generally speaking, if you have it installed by a certified modification shop following national standards—such as ensuring the tank position doesn’t affect the vehicle’s center of gravity, airbags, or emission systems—you should be fine. It’s best to register the modification with the DMV afterward and obtain the modification certification documents. During the inspection, they’ll check the vehicle modification records, and having the proof will help you pass. But if you get it done haphazardly at some random shop, risking structural issues like oil leaks or increased short-circuit hazards, you’ll definitely fail. I recommend consulting professionals before modifying to avoid wasting time and money. Also, while the modification cost isn’t low, it saves fuel and time in the long run, offering good value for money. In short, safety comes first—just proceed with caution.
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