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Is Installing an Original Rear Spoiler Illegal?

2 Answers

OOwen

09/01/25 4:16am

Rear spoiler modification is considered an illegal modification and cannot be registered. The following are the relevant regulations and scope of car modifications: Car Modification Regulations: Car modifications must be carried out in compliance with relevant regulations; otherwise, the vehicle will fail the annual inspection. Therefore, it is advisable for car owners to consult in advance whether the part they intend to modify is illegal before proceeding with the modification. Scope of Car Modifications: The vehicle model, engine model, and frame number cannot be altered, and the body structure must not be damaged. Changing the color of the car, replacing the engine, body, or frame requires inspection of the vehicle. Additionally, a safety technical inspection certificate must be submitted for replacing the engine, body, or frame. Installing windshields, radiators, toolboxes, spare tire racks, front and rear anti-collision devices, or adding interior decorations require a modification registration.

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DeReese

09/13/25 7:04am

I've modified several cars before, and I was particularly concerned about legal issues when installing OEM spoilers. Based on my experience, it's not a simple matter: First, you need to check local regulations. In China, vehicle modifications must comply with the "Motor Vehicle Safety Technical Inspection Regulations." For example, the height of the spoiler cannot exceed the original design too much, otherwise it may fail the annual inspection. The advantage of OEM spoilers is that they are tested by the manufacturer and are generally safe and legal. However, if the appearance is significantly altered through private modifications, traffic police may consider it illegal and impose fines ranging from a couple hundred to over a thousand yuan. I advise fellow car enthusiasts to first check local DMV regulations and, if possible, keep receipts and OEM certification for the parts. In terms of safety, OEM spoilers can improve stability, but improper installation may lead to increased driving noise or wind resistance. Don't cut corners by going to non-professional shops. After installation, it's best to take photos for documentation to avoid future disputes.

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