Can a Car Pass the Annual Inspection After Air Intake Modification?

[DiKing]

Modifying a car's air intake system will prevent it from passing the annual inspection. However, modifications to the body color, engine, fuel type, and frame number are allowed, with the exception of three colors reserved for special vehicles, which cannot be used. Below is additional information: Permitted modifications: Changes to the body color, engine, fuel type, and frame number are allowed, but three colors are reserved for special vehicles and cannot be used; red is for firefighting vehicles, yellow for engineering rescue vehicles, and white over blue for national administrative law enforcement vehicles. Modifications to the body, frame, or engine are only permitted if the original parts are damaged beyond repair or have quality issues. Legal basis: Article 17 of the "Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China" states that if the registered contents on the vehicle's license do not match the actual condition of the vehicle during the safety technical inspection, or if the compulsory third-party liability insurance certificate is not provided as required, the inspection will not be passed.

[VanAiden]

I've had this confusion too. I previously installed a high-performance air intake system on my car, thinking it would improve engine breathing efficiency and make acceleration smoother. However, during last year's annual inspection, it failed immediately. The inspectors checked very carefully, using professional equipment to test exhaust emission data. Modified air intakes often fail to meet standard limits, and discrepancies with the configuration information on the vehicle registration book can also be exposed. Most regions have strict controls on vehicle modifications during annual inspections, especially for core components like air intakes that affect environmental protection. I ended up spending a few hundred dollars to have it restored to factory settings to pass. I recommend checking local traffic regulations before modifying to see if it's allowed to be registered, or restoring it a few days before the annual inspection to avoid last-minute stress. While the fun of modifying cars is important, don't let small changes disrupt the convenience of daily driving.

[SanSerenity]

As a car modification enthusiast, I've done in-depth research on whether intake modifications can pass annual inspections. Indeed, modifying the intake can improve performance—for example, installing a high-flow air filter or upgrading the entire system results in quicker response. However, the annual inspection often gets stuck at the emissions test. During the inspection, the equipment monitors whether emission concentrations exceed standards, and unapproved modifications will almost certainly fail. Many of my fellow car enthusiasts have stumbled at this stage, even facing disputes during insurance claims. If you want to try, opt for reversible minor modifications and register them with the local traffic authorities—though it's best to avoid this in big cities where checks are stricter. Remember, keeping the vehicle in its original state is the most hassle-free approach—don't sacrifice long-term convenience for short-term thrills.

[JoelFitz]

Having worked in the vehicle annual inspection position for many years, I can explain the actual situation. Cars with modified intake systems usually fail the annual inspection, primarily due to regulatory requirements and safety standards. The inspection checks the vehicle's environmental performance, especially the exhaust emission test. Modifying the intake may alter the original design parameters, causing abnormal emission data that fails to meet standards. Inspectors will use equipment to verify each item and reject approval. Even minor modifications like air filter replacements can trigger issues. Owners should adhere to the factory configuration rules, as any unauthorized modifications may risk fines. Restoring the original setup before the inspection is the quickest solution.