···
Log in / Register

How to Determine Which National Emission Standard Your Vehicle Meets?

4 Answers
LaCamilla
07/29/25 10:55am

There are several methods to determine which national emission standard your vehicle meets: 1. Check the vehicle's environmental protection label. There is usually a clear marking on the back of the label attached to the vehicle. 2. Visit the website of the Motor Vehicle Exhaust Pollution Supervision and Management Center to inquire. 3. Bring the motor vehicle registration certificate (original or copy) to the vehicle management office for inquiry. 4. Make a rough estimation based on the year your vehicle was registered. Most vehicles registered after 2008 meet National IV standard; vehicles registered in 2007 may meet either National III or National IV standard; vehicles registered before 2007 mostly meet National III or National II standard; and vehicles registered before 2005 mostly meet National II standard.

Was this review help?
15
3
Share
GriffinFitz
08/13/25 4:36pm

When I changed my car, I checked the emission standards several times. The most straightforward method is to look at the environmental protection label under the car window—that small yellow sticker will indicate the national emission standard (e.g., China IV, China V). If there's no sticker, check the supplementary page of the vehicle registration certificate, which shows the registration date, and then compare it with the implementation timeline of emission standards published on the environmental protection website. For example, Beijing implemented China V standards on January 1, 2013, so vehicles registered after this date are mostly China V-compliant. If you're still unsure, visit a repair shop and use a diagnostic tool to connect to the OBD port and read the engine parameters—it will definitely include environmental information. If all else fails, go to the vehicle management office's archives department to check the registration records. Bring your ID card and vehicle registration certificate, and it’ll take about half an hour. Everyone should pay attention to this when driving, especially now with many traffic restrictions in place. You don’t want to be stopped only to find out your car is a China III vehicle.

Was this review help?
17
1
Share
Expand All
SanParker
10/07/25 7:56am

My friend got burned on this when buying a used car last time. Actually, the easiest way is to check via the official environmental protection WeChat account by entering the license plate number and the last six digits of the VIN - you'll get instant results. The VIN is that 17-digit alphanumeric combination at the bottom left of the windshield. Alternatively, you can call the 4S store with the model and year - cars manufactured after 2017 are at least China V compliant. If online info seems unreliable, just open the glove compartment and find the Vehicle Conformity Certificate - the second-to-last page clearly states which emission standard it meets. Some people think manufacturing date alone suffices, but cars made in the same year might have different emissions - the key is the environmental approval date. I'd recommend verifying carefully since this affects resale value.

Was this review help?
12
3
Share
Expand All
TaylorDella
11/21/25 2:30am

I often help car owners check this during the ownership transfer process. Mainly look at the second page of the vehicle registration certificate, which clearly indicates the emission standard level. If there's no registration certificate, take the vehicle license to the DMV to access the records - the staff can check it in their system. There's also a traditional method: check the last letter of the vehicle model code. For example, Volkswagen models starting with BV are China IV, while BW indicates China V. But this method has inaccuracies, so it's best to cross-reference with the manufacturing year. Most pre-2007 vehicles are China III, while those registered after 2010 are generally China IV. Checking emissions isn't too complicated, and it helps avoid buying restricted vehicles.

Was this review help?
14
3
Share
Expand All
More Forum Discussions

Why Does a Diesel Engine Shake at Idle?

Here are the reasons why a diesel engine shakes at idle: 1. Stuck fuel injector: A stuck or poorly atomizing injector in one cylinder causes that cylinder to not work or work poorly (blue-white smoke may be emitted from the exhaust). This can be checked using the cylinder cut-off method. 2. Uneven fuel supply from the injection pump: Uneven idle fuel supply from the injection pump leads to inconsistent cylinder operation at idle. 3. Low RPM: Improper idle adjustment (too low RPM) can be resolved by adjusting the idle fuel supply screw. 4. Improper valve clearance: Incorrect valve clearance (due to loose adjustment screws, abnormal wear, or abnormal wear of the valve pushrod) causes the cylinder to not work or work poorly. This can be fixed by adjusting the valve clearance. 5. Poor valve sealing, leading to suboptimal operation. 6. Engine overheating or insufficient oil (causing poor lubrication), making it difficult for engine components to operate smoothly.
18
2
Share

Which switch is used for windshield defogging?

Windshield defogging is activated by pressing the defogger switch. Other methods for windshield defogging include: 1. Wiping it clean with a towel. 2. Turning on the car's heater to clear the fog. 3. Leaving a slight gap in the window to remove fog. 4. Using an automotive glass anti-fog spray. Here is some related information: 1. Reasons for windshield fogging are as follows: (1) Temperature difference between the inside and outside of the car. (2) The window temperature is lower than the outdoor temperature. (3) Temperature difference between the two sides of the window. 2. Methods for maintaining the glass include: (1) Using appropriate windshield washer fluid according to the season. (2) Applying automotive glass heat insulation film. 3. Functions of the glass include: blocking wind and rain, noise reduction and sound insulation, reducing wind resistance and guiding airflow, and protecting the safety of passengers.
4
4
Share

Does a manual transmission need gearbox oil change?

New cars do not require it. If the driving time exceeds two years or the mileage exceeds 60,000 kilometers, the gearbox oil should be changed regularly. Expired or deteriorated gearbox oil can cause difficulty in shifting gears and wear on the transmission bearings. Below is relevant information about gearbox oil: 1. The main function of gearbox oil is to keep the shifting system clean and to lubricate and prolong the life of the transmission components. Due to differences in transmission design, gearboxes are divided into manual transmissions and automatic transmissions (further categorized into CVT, AMT, etc.). Each transmission design has different technical requirements. Even the same model of transmission configured in different vehicle models will have variations in torque, weight, speed, and structure. Therefore, the original manufacturer specifies its own dedicated gearbox oil. 2. Generally, an automatic transmission in a car requires an automatic transmission oil change every two years or every 40,000 kilometers. This varies depending on the vehicle model. For Japanese models, it is recommended to change the oil every 40,000 to 80,000 kilometers. Vehicles that frequently drive at high speeds are advised to change the oil approximately every 40,000 kilometers.
11
5
Share

What does lightly pressing the brake pedal mean?

Lightly pressing the brake pedal means: pressing the brake pedal once, then releasing it, and pressing it again, repeating this process. This method is suitable for situations with low road friction coefficient, wading, or tire blowouts, where intermittent pressing of the brake pedal can help reduce speed. Below is an introduction to lightly pressing the brake pedal: 1. Applicable situations: (1) When temporary, slight deceleration is needed at high speeds; (2) When cornering; (3) When following a vehicle ahead and feeling the distance is getting too close, lightly pressing the brake pedal is necessary. 2. Brake pedal operations in vehicles can be divided into: slow braking (i.e., anticipatory braking), emergency braking, combined braking, and intermittent braking. Generally, during slow braking and emergency braking, before the wheels lock up or the vehicle stops, the clutch pedal should be fully pressed to prevent the engine from stalling and to facilitate speed adjustment. 3. Generally, pressing the brake pedal can be done in two steps, avoiding a single hard press: first, press the brake pedal with a force determined by the need—quick and forceful when the speed is high, gentle and steady when the speed is low; then, adjust the pressure based on various conditions. Pressing the brake pedal at high speeds can easily cause skidding. When the vehicle skids, the pressure on the brake pedal should be appropriately reduced to prevent the vehicle from veering off course and losing steering control.
8
0
Share

What does 2.0xl mean?

In car models, XL indicates that the vehicle belongs to the luxury version. Other code knowledge extensions are as follows: 1. XE refers to the comfort version sedan. 2. XL refers to the luxury version sedan. 3. XV refers to the super luxury version vehicle. 4. XVNAVI is XV-NAVI, which refers to the super luxury version vehicle with a navigation system. Knowledge extension about the letter T is as follows: 1. T stands for turbocharging, indicating that the vehicle is equipped with a turbocharged engine. 2. A turbocharger is essentially an air compressor that increases air intake by compressing air. 3. It utilizes the inertial impulse of exhaust gases from the engine to drive the turbine in the turbine chamber, which in turn drives the coaxial impeller. The impeller compresses the air delivered through the air filter pipeline, pressurizing it into the cylinders. 4. As the engine speed increases, the exhaust gas discharge speed and turbine speed also increase synchronously, allowing the impeller to compress more air into the cylinders. The increased air pressure and density enable the combustion of more fuel, and correspondingly increasing the fuel quantity can enhance the engine's output power.
19
4
Share

What is the function of an intercooler?

The function of an automotive intercooler is to reduce the intake air temperature of the engine. The intercooler is essentially a supporting component for turbocharging, and its role is to improve the engine's air exchange efficiency. Specific details are as follows: 1. The exhaust gas emitted by the engine is at a very high temperature, and the heat conduction through the turbocharger increases the intake air temperature. During the compression process, the air density increases, but this also causes the temperature of the air discharged by the turbocharger to rise with the increase in pressure, leading to a decrease in oxygen density, which affects the engine's effective charging efficiency. 2. If the turbocharged air enters the combustion chamber without cooling, it not only affects the engine's charging efficiency but also easily leads to excessively high combustion temperatures, causing issues such as knocking. Additionally, it increases the NOx content in the engine's exhaust, contributing to air pollution. 3. Reduces the engine's fuel consumption. 4. Enhances adaptability to high altitudes. In high-altitude areas, using an intercooler allows for a higher pressure ratio compressor, which enables the engine to generate more power and improves the vehicle's adaptability. 5. Improves turbocharger matching and adaptability.
3
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.