What is the emission standard for cars from 2005?

[MacHenry]

2005 vehicles mostly comply with National II or National III emission standards, with most sedans, SUVs, and MPVs being National III. Methods to check a car's emission standard: 1. Environmental Label: The simplest way is to look at the vehicle's environmental label, which clearly indicates the standard on the back. 2. Vehicle Emission Supervision Website: Visit the official website of the Vehicle Emission Supervision Center to check. 3. Vehicle Management Office: Bring the vehicle registration certificate (original or copy) to the local vehicle management office for inquiry. 4. Factory Certificate: Check the vehicle's factory certificate, but since it is usually kept by the vehicle management office, it's advisable to make a copy when purchasing the car for future reference. 5. Rough Estimation Based on Registration Year: a. Most cars registered after 2008 are National IV. b. Cars registered in 2007 may be National III or National IV. c. Cars registered before 2007 are mostly below National IV, i.e., National II or National III. d. Cars registered before 2005 are mostly National II.

[SanDante]

I've researched vehicle emission standards for quite some time. Cars from 2005 in China mostly comply with China II emission standards, as the regulation was officially implemented in July 2004. As a tech enthusiast, I find checking emission standards quite straightforward—you can simply refer to the vehicle certification or motor vehicle registration certificate, which clearly indicates the China II marking. The China II standard imposes stricter controls on carbon monoxide in exhaust emissions compared to the older China I standard, though it's less advanced than the subsequent China III. Nowadays, many cities restrict China II vehicles from entering urban areas; for instance, certain zones in Beijing have driving restrictions, which significantly impacts owners. Regular maintenance of the engine and exhaust system can help avoid failing annual inspections—emission issues might lead to minor fines or, in severe cases, costly repairs. While a 2005 vintage car may still run fine, upgrading is worth considering from an environmental perspective.

[VanJameson]

I remember when I first bought a 2005 sedan, the salesperson said it was compliant with China II emission standards. After driving it for a few years, I did encounter issues with excessive exhaust emissions during annual inspections. Back then, I always had to go to the repair shop to clean the oxygen sensor, which was both costly and troublesome. As an ordinary car owner, I now recommend checking the vehicle's green book, which contains details about the emission standards. Older cars with poor emissions can be quite problematic to drive in the city—for example, certain districts in Shanghai have restrictions, affecting travel convenience. Well-maintained older cars can still run, but it's best to confirm the standards before buying to avoid sudden policy changes. When choosing a used car, extra caution is needed, as China II emission standards can affect transfer procedures and insurance costs. Good driving habits not only save fuel but also reduce emissions, killing two birds with one stone.

[LaCharlie]

I'm an auto repair craftsman with experience working on many 2005 model vehicles, most of which comply with China II emission standards. By inspecting the exhaust system components like catalytic converters and sensors, you can determine the standard. Vehicles with aging emission systems tend to trigger warning lights, and repair costs can be significant, so I recommend owners get their vehicles inspected every two years. China II standard vehicles often encounter issues during annual inspections, though simple maintenance can improve performance. Most 2005 models have stable emissions, but modifying electrical systems may increase pollution. From a repair perspective, the impact of emissions on small components shouldn't be underestimated.