Will Traffic Police Check Roof Films?

2 Answers
DelSara
07/28/25 9:25pm
According to relevant laws and regulations: Decorative or protective measures for a car's appearance can be appropriately chosen based on individual circumstances. Changes to the vehicle's body color and frame: An application must be submitted to one of the six branches of the Vehicle Management Office under the Traffic Management Bureau. After vehicle confirmation and approval from the branch, the changes can be made. Therefore, applying a roof film is not illegal if done under specified conditions, and traffic police will not check it. More details are as follows: 1. A good car film can filter out some glare, reduce the intensity of visible light, making the eyes more comfortable, which helps improve the driver's vision and ensures driving safety. 2. It is recommended that users avoid choosing films with too low light transmittance. For window films, especially those on the front side windows, a light transmittance of over 85% is more appropriate. Additionally, relevant regulations in China stipulate that car films must have a light transmittance of over 70% to pass the annual inspection.
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DelPreston
08/12/25 2:04am
I've been following automotive regulations for many years, and traffic police do indeed inspect roof films. This is mainly because China has strict regulations requiring that the light transmittance of window films must not be less than 70%, otherwise it may affect driving visibility and safety. If the roof film is too dark or highly reflective, it can easily catch the attention of traffic police during roadside checks, and they will measure it with professional instruments. Last year, I came across a case where a car owner was fined 500 RMB and received penalty points for using a dark film. It's advisable to choose reputable brands when purchasing roof films and check for certification labels. If the light transmittance test is passed, there should generally be no issues. Regularly inspect the condition of the film before driving to avoid dust accumulation or discoloration. Annual inspections also focus on this—if the light transmittance fails, you’ll be required to rectify it. Safety comes first, so modifications should be done responsibly.
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