Why is Car Modification Illegal?

2 Answers
LilyDella
07/30/25 2:48am
Laws and regulations impose restrictions on car modifications. The vehicle model, engine model, and chassis number cannot be altered, and the body structure must not be compromised. If the car's color is changed, or the engine, body, or chassis is replaced, the vehicle must be inspected. Additionally, replacing the engine, body, or chassis requires submitting a valid motor vehicle safety inspection certificate. Decals or stickers must not cover more than 30% of the total body area. However, there are cases where car modifications are not illegal. Changing the car's color: It is permissible to change the car's color, but avoid using camouflage patterns, fire engine red, emergency vehicle yellow, or law enforcement's white-and-blue scheme. Most importantly, remember to complete the modification registration at the vehicle management office within ten days and obtain a new driving license. For those who wish to add decals, ensure the coverage does not exceed 30% of the car's body area. Important notes: In principle, modifications are allowed as long as they do not affect driving safety. However, seats cannot be removed, the interior structure must remain unchanged, and any structural features registered with the vehicle management office must not be altered without authorization.
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Braylen
08/16/25 9:06am
Having worked as a car mechanic for over a decade, I've noticed many young people don't understand why there are restrictions on modifications. The primary concern is safety. For instance, randomly altering the suspension can disrupt the factory tuning, making the car prone to losing control during emergency lane changes. Last time, a lowered Honda Civic came into the shop and scraped its oil pan clean over a speed bump. Then there are those who install overly bright headlights, blinding oncoming drivers. Regulations are even stricter about engine and exhaust modifications. Flashing the ECU might cause emissions to exceed standards, and excessively loud exhaust systems can result in fines. Actually, the regulations do allow some leeway: you can change to wheels of the same size or modify the body color with proper documentation. Just don't touch the powertrain or chassis structure.
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