What Car Modifications Are Legal?

2 Answers
SanJude
07/25/25 3:53pm
Car modifications can involve changing the body color, replacing the engine, or replacing the body or frame. Here is relevant information: 1. Car modifications: Car modifications refer to altering the external appearance, interior styling, and mechanical performance of a prototype vehicle produced by the manufacturer, based on the owner's needs. These mainly include body modifications and performance modifications. 2. Relevant regulations: The new "Road Traffic Safety Law" clearly stipulates that no unit or individual may assemble a motor vehicle or alter its registered structure, construction, or characteristics without authorization. The vehicle's structure includes four mandatory standards—body color, length, width, and height—as well as the technical parameters of the engine.
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HarperLee
08/11/25 9:37pm
I've been modifying my car for a few years and know the legal modification range is quite broad. First, exterior wraps are fun, but the windshield's light transmittance must be over 70%, or you'll get fined by traffic police. Changing rims is also fine—just stick to reputable brands and don't alter the size. Tire dimensions must match the factory specs; going too large affects braking safety. I also added a roof rack, keeping the height under 30 cm—any taller increases wind resistance and becomes unsafe. Interior mods are even more fun: upgrading the audio system is fine, but avoid exceeding power limits to prevent electrical issues. Seat covers shouldn’t block airbags. For lighting upgrades like LED headlights, ensure they have certification marks and aren’t overly dazzling. These small tweaks personalize your ride—just remember to file the modifications with the DMV afterward for peace of mind on the road.
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