
Interior modification does not require registration. Here are the relevant details: No change registration required: Without affecting safety and license plate identification, the owner of the motor vehicle does not need to apply for change registration, such as small and micro passenger cars installing front and rear anti-collision devices; cargo motor vehicles installing windshields, water tanks, toolboxes, spare tire racks, etc.; and adding interior decorations to motor vehicles. Changes subject to warning or fine: The traffic management department of the public security authority may issue a warning or impose a fine if the body or rear of the cargo compartment of heavy and medium-duty trucks and their trailers are not painted with enlarged license plate numbers as required or if the enlarged license plate numbers are unclear; or if the motor vehicle is painted or pasted with logos or body advertisements that affect safe driving.

Regarding whether interior modifications require registration, I think this matter should be discussed from the perspective of laws and regulations. Under China's traffic regulations, interior modifications such as changing seat covers, installing new audio systems, or altering interior colors—these superficial adjustments—generally do not require registration with the vehicle management office, as they do not alter the vehicle's main structure. However, if you modify safety-related components, such as altering the seat frame or seatbelt system, or areas affecting airbag functionality, then you may need to declare and register these changes. Failing to do so could lead to issues during annual inspections or even result in fines. Additionally, unregistered modifications might cause insurance disputes; in the event of an accident, the insurance company could refuse compensation. I recommend checking local traffic regulations before making any changes or consulting a professional repair shop to avoid minor modifications leading to major troubles. The core idea is: minor modifications can be freely done, but when it comes to safety, don't take it lightly.

Interior modifications can be cool, but safety should always come first. I've heard that some car owners, after modifying their interiors, accidentally affected the airbag positions or seat strength, significantly increasing risks during accidents. So, is filing necessary? In most cases, simple changes like carpets or decorations don't require filing. However, if modifications involve the car's frame or safety equipment, filing is more prudent for safety's sake. Personally, I believe modifications are meant to enhance the experience, but potential hazards shouldn't be overlooked. Choose genuine parts and have professional shops inspect to ensure functionality remains unaffected post-modification. This saves hassle during annual inspections or accident claims. Remember, safety is far more important than aesthetics—don't regret cutting corners for temporary convenience.

I've modified my car's interior quite a few times, such as changing the steering wheel and interior trim. Experience says these minor modifications generally don't require registration, as authorities rarely regulate interior decorations. Unless you alter seat structures or install large equipment, which might need declaration. Policies vary by region, so I always call the traffic management department before modifying to avoid issues during annual inspections. Keeping modifications minimal ensures smooth sailing. Checking forums or consulting friends, most agree with this approach. In short, as long as you don't modify the vehicle body, you can be a bit more liberal.


