Is it illegal to install a spoiler on a car?

[BraxtonMarie]

Installing a spoiler on a car is illegal. Here are some specific regulations: 1. Motor Vehicle Registration Regulations: According to Article 57 of the 'Motor Vehicle Registration Regulations,' except for the circumstances specified in Article 10 and Article 16 of these regulations, any unauthorized alteration of the motor vehicle's appearance or registered technical data will result in the traffic management department of the public security authorities ordering the restoration of the original condition and imposing a warning or fine. 2. Other regulations: Article 16 states that under the following circumstances, the owner of the motor vehicle does not need to apply for a modification registration, provided that safety and license plate recognition are not affected: (1) Installation of front and rear anti-collision devices on small and micro passenger vehicles; (2) Installation of windshields, water tanks, toolboxes, spare tire racks, etc., on cargo motor vehicles; (3) Addition of interior decorations to the motor vehicle.

[MirandaAnn]

I've just researched this modification issue and found that adding a spoiler is indeed illegal in many places. The key point is that it's considered a vehicle appearance modification, which alters the original registered parameters without filing. You need to apply for approval at the vehicle management office first, and only install it after getting permission. Otherwise, you may face fines or penalty points if caught by traffic police. I've seen cases in car enthusiast groups where someone was immediately stopped and fined 200 yuan on the highway for installing a large spoiler without filing, which also affected aerodynamic safety. Don't underestimate this - it might also cause issues during annual inspections, leading to costly and troublesome repeated installations. If you really want to modify, I suggest checking local regulations carefully first. Some cities enforce stricter controls, so don't take risks with unauthorized modifications.

[MacMia]

I heard a friend got fined for modifying his rear wing, which gave him quite a headache. He thought it was just a cool accessory and didn't matter, but one day while waiting at a red light in the city, he was spotted by traffic police. They checked his vehicle registration and found the appearance didn't match, issuing a warning and ordering him to restore it. This taught me a lesson: modifications must be registered with the DMV before installation. Without approval, you'll face a lot of trouble on the road, and in case of an accident, the insurance company might find reasons to deny your claim. Nowadays, many places strictly inspect exterior modifications, with car decals and rear wings being key targets. I figure it's better to make some subtle interior changes—much less hassle. Safety first, don't let your hobbies get you into trouble.

[DiReed]

Whether adding a spoiler is illegal depends on the situation. If not registered, it indeed violates motor vehicle modification regulations. The DMV has an application process, and it's only legal to drive after approval. Otherwise, you may face penalties and compromise driving safety. Spoiler designs alter the vehicle's aerodynamics, and improper installation is even more dangerous. I know many people experience instability at high speeds after modifications or fail annual inspections, requiring rework. I advise against pursuing a temporary cool look—consider the actual safety risks and legal costs. First, consult professional institutions to confirm the policies.