What is the equivalent national emission standard for IV?

[NevaehLee]

IV is a Roman numeral, corresponding to the Arabic numeral 4, so National IV is the National 4 standard. Here are the relevant explanations: 1. Some people worry that after the implementation of the National 6 policy, National 4 vehicles will be forcibly scrapped, and there are even rumors that all National 4 vehicles will be banned from the road by 2020. 2. First of all, it can be confirmed that the above claims are all rumors. 3. The National 6 standard is implemented in first- and second-tier cities, while third- and fourth-tier cities and beyond are basically unaffected by National 4 vehicles. However, after the implementation of National 6, some areas in first- and second-tier cities will restrict the use of National 3 standard vehicles, and basically, National 3 vehicles will enter the guided scrapping period. 4. After China updated to the National 6 standard, the emission requirements are now on par with Europe, even surpassing them. Considering that both China and Europe update their emission standards every 5 years, plus a minimum 3-year buffer period for restriction policies, after the implementation of the National 6 standard, National 4 vehicles can still be driven for at least 8 more years, and National 5 vehicles for at least 13 more years.

[DelAthena]

I've been driving for over ten years and am quite familiar with emission standards. IV is the Roman numeral for four, so China IV refers to the National Phase IV emission standard, which represents the fourth stage of national requirements. It was implemented around 2013, mainly targeting the reduction of harmful substances in exhaust emissions, such as carbon monoxide and particulate matter. If your car displays this standard, it means it's relatively old but still roadworthy, though it might face restricted zones in major cities like Beijing, Shanghai, and Guangzhou. I usually pay attention to maintaining the fuel system and air filters to prevent minor issues from accumulating, which could lead to emission failures during annual inspections. Change the oil on time, and using low-ash oil is better for the environment. When checking used cars, don't just look at the mileage; emission standards are crucial. China IV cars still hold decent resale value now, but they won't retain value as well as China V cars in the long run.

[AlyssaAnn]

This is a common question from car owners during repairs. 'Guo IV' refers to China's National IV emission standard, equivalent to the Roman numeral four. It was introduced around 2013 with significantly stricter requirements than National III, mandating greater reductions in tailpipe pollutants. For instance, when I use diagnostic tools like OBD scanners to read fault codes, National IV vehicles often trigger alerts for faulty sensors or poor fuel quality. I recommend checking the vehicle's nameplate or registration documents to confirm the emission standard—some older cars with missing labels may require VIN lookup. Avoid unauthorized ECU tuning or exhaust modifications, as these may cause actual emissions to exceed limits and affect annual inspections. National IV vehicles aren't particularly troublesome for maintenance, but more frequent spark plug and oxygen sensor replacements help maintain stable emissions.

[StClayton]

As someone who cares about the environment, I know that China IV represents the National Fourth Stage Emission Standard, an important step in reducing vehicle pollution. IV corresponds to the number four, and this standard was implemented around 2013, requiring reductions in particulate matter and hydrocarbon emissions to help improve air quality. It shows significant progress over China III by reducing sources of smog. If everyone considered emissions when choosing a car, such as opting for China VI or electric vehicles, urban air quality would improve. I recommend smooth acceleration and less sudden braking while driving, as these habits can reduce exhaust emissions.