···
Log in / Register

How to Determine if a Car is China IV or China V Standard?

6Answers
Carson
08/27/2025, 12:20:49 AM

Methods to identify whether a car meets China IV or China V emission standards: 1. Check the environmental protection label issued during vehicle inspection. A compliance sticker is provided upon passing the inspection, which should be affixed to the upper right corner of the windshield. The number of stars on the label indicates the emission standard - for example, 4 stars represent China IV. 2. Visit the official website of the local traffic management bureau to query the vehicle's emission standard. 3. The Motor Vehicle Environmental Protection Website can also verify emission standards by entering the car's brand and model. Automobile emission standards regulate the permissible levels of harmful gases such as carbon monoxide, hydrocarbons, nitrogen oxides, and particulate matter (PM) in exhaust emissions.

Was this review help?
117
Share
LandonRose
09/08/2025, 11:25:16 PM

I've encountered this issue several times. The simplest and most straightforward method is to check the vehicle registration certificate, that green booklet. Turn to the page with vehicle information, and the emission standard is clearly stated. If you don't have the green booklet on hand, look for the nameplate on the co-pilot door frame, which contains the VIN and engine model. Input these two numbers into the motor vehicle environmental protection inquiry platform, and the result will pop up immediately. If you find it troublesome, you can directly check the environmental information section on the vehicle conformity certificate or the certificate of compliance. I remember helping a friend inspect a used car last year and found that most vehicles produced after 2016 are at least China V standard, while most from 2011 to 2015 are China IV standard. This timeline can also serve as a reference. The key point is that emission standards affect vehicle transfer and traffic restrictions, so don't take them lightly.

Was this review help?
13
Share
Expand All
RowanLee
10/23/2025, 12:13:58 AM

Just helped my cousin check his car last week. There are mainly four channels: first choice is the Motor Vehicle Environmental Protection Website, enter the last six digits of the VIN and engine number, official data is the most reliable; second is to check the third page of the big green book, the emission standard column is clearly written; then look at the environmental protection vehicle list that came with the car when it was new, black and white won't be wrong; finally, check the manufacturing date label on the door B-pillar, cars manufactured after July 2017 are basically China V. A reminder, implementation times vary by city, like Beijing and Shanghai implemented China V in 2016, while third and fourth-tier cities might be later. Recently, a lot of people are checking emissions, mainly because China IV cars are not allowed to transfer ownership in many places.

Was this review help?
12
Share
Expand All
McSimon
12/05/2025, 11:37:35 PM

I know this like the back of my hand. First, check the 17-digit VIN at the bottom left corner of the windshield - wipe off any dust if needed. Then locate the engine number, usually under the hood. Open your phone and search for the 'Motor Vehicle Environmental Protection Inquiry' official website, enter these two sets of numbers, and it'll immediately show whether it's China IV or China V standard. If you're not internet-savvy, you can also check the vehicle records at the DMV. Additionally, look for the yellow environmental label on the car - though new cars don't get them anymore, older vehicles might still have them on the windshield. Emission standards make a huge difference: China V vehicles can legally operate several years longer than China IV, and the used car price gap can be 3,000-5,000 yuan.

Was this review help?
19
Share
Expand All
Ralph
01/26/2026, 12:56:52 AM

Checking emission standards involves three steps: First, locate the vehicle's ID, which is the VIN (alphanumeric combination) under the windshield. Second, note down the last six digits of the engine number. Third, visit the motor vehicle environmental protection inquiry page on the Ministry of Ecology and Environment's official website and enter these two numbers. If no results are found, it may indicate that the vehicle is an early model, and you'll need to check the national standard code marked at the bottom of the original vehicle compliance certificate. Another straightforward method is to directly call the manufacturer's customer service, provide the VIN, and inquire—they have records in their system. The China V standard is significantly stricter than China IV, primarily differing in nitrogen oxide emissions, with the new standard reducing pollutants by 25%.

Was this review help?
19
Share
Expand All
Harley
04/21/2026, 11:25:56 PM

The most reliable way to check emission standards follows three steps: First, check the green vehicle registration certificate—the emission standard is listed on the second page under vehicle parameters. Next, locate the VIN at the bottom left of the windshield, enter it along with the last six digits of the engine number into the environmental protection website. Lastly, check the manufacturing date label—most cars produced after 2017 meet China 5 standards. I keep the environmental website bookmarked on my phone, and friends often ask me to help check when buying cars. Nowadays, WeChat mini-programs can also verify emissions—just snap and upload the vehicle license. Emission standards update rapidly; rumor has it China 6B will take effect this July, likely causing China 5 cars' resale value to drop.

Was this review help?
15
Share
Expand All
More Q&A

Differences Between Turbocharging and Naturally Aspirated Engines?

Automotive turbocharging and naturally aspirated engines differ in terms of engine construction, vehicle power, and maintenance costs. Below are the specific differences between turbocharging and naturally aspirated engines: 1. Different engine construction. Turbocharged engines are based on traditional engines with the addition of a turbocharging device, while naturally aspirated engines do not have a turbocharging device. 2. Different vehicle power. Turbocharged engines of the same displacement can deliver over 40% more power performance than naturally aspirated engines, meaning the same engine can output greater power after turbocharging. In other words, under the same displacement conditions, turbocharged engines provide more explosive power than naturally aspirated engines. 3. Different maintenance costs. Turbocharged engines, with their stronger power, tend to experience performance degradation faster than naturally aspirated engines, leading to higher long-term maintenance costs. Naturally aspirated engines, lacking the intense pressurization of turbocharging, degrade more slowly and have relatively lower maintenance costs.
117
Share

What is the working principle of an automotive relay?

Automotive relay working principle: Simply put, it refers to energizing the relay coil, which generates magnetic force. This magnetic force attracts an iron piece containing a switch to achieve a switching function. Here is a detailed explanation: 1. A relay is both a control switch and a controlled object (actuator). Taking the fuel pump relay as an example, it is the control switch for the fuel pump. However, the coil of the fuel pump relay can only form a circuit through the grounding point of the electronic control unit when the driving transistor in the electronic control unit is turned on. 2. When a certain voltage or current is applied to both ends of the relay coil, the magnetic force generated by the coil acts through the magnetic circuit composed of the iron core, yoke, armature, and working air gap. Under the influence of the magnetic field, the armature is attracted to the pole face of the iron core, thereby pushing the normally closed contacts to open and the normally open contacts to close. When the voltage or current at both ends of the coil is below a certain value, the mechanical reaction force exceeds the electromagnetic attraction force, causing the armature to return to its initial state, with the normally open contacts opening and the normally closed contacts closing.
113
Share

Where is the OBU?

OBU: On-Board Unit. The OBU device is usually installed on the car's front windshield. Below is extended information on the correct installation method for the OBU: 1. Open the electronic tag, peel off the adhesive backing, and firmly attach the electronic tag to the upper part of the front windshield. 2. Press the Bluetooth button on the top of the electronic tag, insert the card, and the electronic tag screen will display that Bluetooth is turned on. 3. Turn on your phone's Bluetooth, enter the WeChat mini-program or the relevant app. Click on 'Apply for Card - Activate Electronic Tag', and Bluetooth will automatically sense and activate it. 4. Upload a front photo of the vehicle, and it will be ready to use.
103
Share

How to Remove the Key If It Won't Come Out?

Turn the key counterclockwise two notches, then gently press it in and turn it one more notch to remove the key. Alternatively, press the key in directly and turn it counterclockwise three notches to pull it out. Below are explanations for why the key might not come out: 1. After turning off the engine, the key getting stuck is common in automatic transmission models. The reason is that the gearshift is not fully returned to the P (Park) position. It may appear to be in place, but it hasn't actually triggered the electronic sensor, or there might be obstacles like coins in the gear slot preventing it from returning. In this case, the owner should check the gear slot for any obstructions, remove them, start the car, shift the gear again to ensure it's fully engaged, and the key can then be removed. 2. After turning off the engine, the most common reason the key won't come out is the steering wheel lock engaging, which prevents key removal. In this situation, avoid forcing the key. Instead, slightly move the steering wheel while turning the key to release it. Some vehicles are designed with enhanced security features that prevent key removal unless the gearshift is in the P (Park) position. Therefore, to remove the key, the gear must be set to P.
105
Share

What engine is used in the Dongfeng AX7?

The engine of the Dongfeng Fengshen AX7 is from the French PSA Group. The engine model of the Dongfeng Fengshen AX7 is DFMC15TP1, with a maximum power of 140 kW, maximum torque of 300 Nm, maximum horsepower of 190 Ps, maximum power speed of 5200 rpm, and maximum torque speed range of 2000-4000 rpm. For daily maintenance of the Dongfeng Fengshen AX7 engine, the following methods can be used: Use lubricating oil of appropriate quality grade. For gasoline engines, SD--SF grade gasoline engine oil should be selected based on the additional devices of the intake and exhaust systems and usage conditions. For diesel engines, CB--CD grade diesel engine oil should be selected according to mechanical load, with the selection standard not lower than the manufacturer's requirements. Regularly change the engine oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, performance deteriorates, which can cause various problems for the engine. To avoid malfunctions, change the oil regularly according to usage conditions and maintain an appropriate oil level. When oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is clogged and oil cannot pass through, the filter may burst or the safety valve may open, allowing oil to bypass through the bypass valve and carry contaminants back to the lubrication areas, accelerating engine wear and increasing internal contamination. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. Small amounts remain suspended in the oil, while larger amounts precipitate, clogging filters and oil passages, making engine lubrication difficult and causing wear. Regularly use radiator cleaner to flush the radiator. Removing rust and scale deposits not only ensures normal engine operation but also extends the overall lifespan of the radiator and engine.
120
Share

How to Shift from D Gear to S Gear?

While the car is in motion, you can directly shift from D gear to S gear. The D gear can also be engaged into S gear during acceleration. Here is an introduction to shifting from D gear to S gear in an automatic transmission car: 1. When shifting from D gear to S gear in an automatic transmission car, there is no need to press the brake or come to a complete stop. The car can directly shift from D gear to S gear while driving, and the D gear can also be engaged into S gear during acceleration. After shifting to S gear, the power output becomes more intense, and fuel consumption increases accordingly, with power and fuel consumption being directly proportional. 2. For normal driving, D gear is generally used, as it has a very wide range of applications. In situations requiring higher power, S gear or sport mode can be used.
111
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.