
China IV emission standards began in 2011 and lasted until the implementation of China V standards in 2018. Therefore, vehicles produced between 2011 and 2017 all comply with China IV standards. The China IV standard requires approximately 50% lower emissions of various pollutants compared to China III. Currently, with China VI standards approaching, vehicles meeting China III emissions are facing mandatory retirement. Here is more information: 1. Different countries and regions adopt varying emission standards based on their actual conditions. For example, the U.S. has U.S. standards, Europe has Euro standards (Euro IV, Euro V, etc.), and China has national standards (China IV, China V, etc.). 2. There are three main test cycles for passenger vehicle emissions: the EU's NEDC cycle, the U.S.'s FTP75 cycle, and Japan's JC08 cycle.

China's National IV emission standards were actually implemented in phases based on vehicle types and regions. As a used car appraiser, I remember that the nationwide unified implementation for light-duty vehicles was in July 2011, when new vehicles had to meet National IV standards to be registered. However, major cities like Beijing and Shanghai had stricter requirements. Beijing piloted the standards in the taxi sector before the 2008 Olympics and fully implemented them for private cars by 2010. Diesel vehicles were slightly later, with heavy-duty vehicles not mandated until 2013. Interestingly, many third- and fourth-tier cities had longer transition periods. I've encountered vehicles manufactured in 2013 that were among the last batch of National III models but were registered in 2014, so it's essential to check the vehicle's certification for specifics.

Veteran truck drivers in the transportation industry are likely more familiar with the diesel vehicle timeline. With twenty years of freight experience, I recall July 2013 being a watershed moment for trucks - newly produced diesel vehicles over 3.5 tons had to meet China IV emission standards. The urea injection system became standard equipment then, significantly increasing costs. Now in 2023, many China IV diesel trucks have been labeled yellow-sticker vehicles, facing daytime bans in places like Suzhou Industrial Park, forcing our fleet to retire and replace them early. However, light-duty gasoline vehicles actually implemented nationwide standards earlier - all new vehicles after July 2011 came equipped with OBD diagnostic ports.

I just checked the green book of my family's 2009 sedan, which shows it's China III compliant. The salesperson back then mentioned that China IV might be introduced, and sure enough, by 2011 when we replaced the car, China IV was in effect. I recommend checking your vehicle's environmental label – there's also an emission compliance sticker on the door frame of the passenger side. Here's a lesser-known fact: Beijing implemented China IV standards as early as 2008, three years ahead of the national schedule. Nowadays, many regions don't allow the transfer of China IV vehicles – last year, I helped a friend with an out-of-province transfer of a China IV car, and it was rejected.

Emission standards advancement varies by region. Owners in North China feel it more deeply: Beijing taxis implemented China IV in 2008, extending to private cars by 2010; Tianjin only fully adopted it in 2012. The South was slightly slower but implemented faster—many owners in Shenzhen were caught off guard when China III vehicles were suddenly restricted in 2013. When buying a used China IV car, note: 1) Models produced between 2011-2013 are safer bets 2) Ensure it has an OBD detection port 3) Check the environmental protection website’s approved catalog. A certain brand was still producing China IV inventory cars in 2017, which have now become value-retention tools.


