What are the new regulations for National IV diesel vehicles in 2021?
4 Answers
Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the control and reduction of vehicle emission pollutants to below specified standards are achieved. Below is an introduction to National IV: 1. Concept: The National IV emission standard is the fourth stage of China's motor vehicle pollutant emission standards. 2. Issues: According to regulations, the National IV standard was to be fully implemented from October 1st, but this "standard" seems to apply only to automobile manufacturers. Regarding the promotion of National IV gasoline, the availability at gas stations remains uncertain. It was estimated to be unlikely that all fuel would be upgraded to National IV by October 1, 2012. Although the National IV standard was implemented from September 1st, locally, especially the supply of diesel that meets the "National IV" standard, was not available.
Last year when I drove a China IV diesel truck, I noticed the regulations had tightened significantly, mainly with expanded low-emission zones in cities. Places like Beijing and Shanghai restrict China IV vehicles outside the Second Ring Road, making it impossible to enter during peak hours—getting caught means fines. The environmental groups say it’s to reduce PM2.5 emissions and encourage upgrading to China VI vehicles. I think it’s reasonable—no one likes polluted air. Some smaller cities even mandate installing DPF filters to cut tailpipe pollution, but the installation isn’t cheap, often costing thousands. I’d advise long-haul drivers to plan routes in advance to avoid restricted zones. Overall, this isn’t an overnight change but a gradual shift. Preparing early to upgrade vehicles or parts can save trouble, and in the long run, it means a cleaner planet.
The 2021 National IV diesel vehicle policies have become stricter, and I strongly support this change because environmental protection is the overarching trend. Many cities like Shenzhen and Hangzhou have expanded low-emission zones, increasing restrictions on National IV vehicles in terms of areas and time slots, with penalties including fines and demerit points for entering core zones. The government has also tightened annual inspections, directly scrapping vehicles that exceed emission standards. This policy encourages owners to upgrade to National VI vehicles or install eco-friendly components to reduce nitrogen oxide pollution. Some regions offer subsidies, providing tens of thousands for vehicle replacements. As someone concerned about sustainability, I've researched data showing diesel vehicles are a major source of smog. I recommend everyone comply with the policies by switching to public transport or electric vehicles. These rules aren't just about fines—they genuinely aim to improve quality of life.
I bought a used National IV diesel van and heard about policy changes, worried about getting stuck on the road. Simply put, the 2021 regulations mean more urban area restrictions—driving in city centers like Chengdu or Guangzhou requires checking maps to avoid fines. Some areas also mandate installing emission control devices, or you won't pass the annual inspection. My friends say rural driving is fine, but urban areas need caution. They advise frequently checking traffic apps for updates. The rules aim to reduce pollution, which is good long-term, though a bit costly for small vehicle owners.
