What is the emission standard for the 2013 Jetta?

[LaDerek]

The 2013 FAW-Volkswagen Jetta models sold in regions outside of Beijing, Shanghai, and Guangzhou generally comply with the China IV emission standard, while some models sold in these major cities meet the China V standard. Additional relevant information is as follows: 1. Automobile emission standards regulate the permissible levels of harmful gases emitted from vehicle exhaust, including CO (carbon monoxide), HC+NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). Starting from January 1, 2004, Beijing upgraded its vehicle emission standards from Euro I to Euro II, and by 2008, it officially implemented the Euro III standard. 2. Automobile emissions refer to the harmful gases released from exhaust, such as CO (carbon monoxide), HC+NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). These gases are byproducts of engine combustion. The reasons for their production vary: CO is an intermediate product of incomplete fuel oxidation, occurring when oxygen is insufficient; rich or uneven air-fuel mixtures increase CO emissions. HC consists of unburned fuel components, resulting from uneven mixtures or cold combustion chamber walls causing incomplete combustion. NOx is produced during the combustion of fuel (gasoline). PM forms when fuel burns under oxygen-deficient conditions, particularly noticeable in diesel engines due to their compression-ignition process, where diesel fuel decomposes under high temperature and pressure, generating visible soot particles.