Heavy-duty Vehicles Emissions Standards

Last updated: 8 February 2023

In 2018, China released China VI emissions standards that apply to new heavy-duty diesel vehicles nationwide in two stages. The first stage, China VI-a, is largely equivalent to Euro VI and applied to gas engines in July 2019, urban HDVs in July 2020, and all new HDVs in July 2021. The second stage, China VI-b, adds requirements such as anti-tampering monitoring and remote on-board diagnostics data reporting that are expected to enhance real-world emissions compliance. China VI-b will apply to gas engines nationwide starting in January 2021 and all new HDVs in July 2023.

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