In early July of 2026, SAC/TC114 (Road Vehicles) issued several notice to call for comments on drafts of several national standards or amendments on tests for different aspects and types of vehicles.
The basic information of the standard/amendment drafts are summarized as below:
Standard No./Project No. | Standard Title | Main Content (from "Scope" section) | Replaced Standard | Relationship with International Standard | Deadline for Comments |
20261033-T-339 | Road vehicles — Test of braking systems on vehicles with a maximum authorized total mass of over 3,5 t using a roller brake tester — Part 1: Pneumatic braking systems | It describes the terms, definitions, and test methods for roller brake tester procedures. It is applicable to roller brake tester tests on vehicles of categories M₂, M₃, N₂, N₃, O₃, and O₄ (as per GB/T 15089) with a maximum authorized total mass of over 3.5 t and equipped with pneumatic braking systems. | Newly-drafted | MOD, ISO 21069-1:2004 | 2026/8/31 |
20256221-T-339 | Test methods for extreme environment adaptability of vehicles | It specifies the test conditions, test vehicles, test procedures, data processing, and test reports for vehicle environmental adaptability tests. It applies to environmental adaptability tests carried out on various types of road vehicles in four extreme environments: low temperature, high temperature dry heat, high temperature humidity, and high altitude. | GB/T 28958—2012 | N/A | 2026/9/1 |
20261149-T-339 | Road vehicles - Spark-plugs - Test methods and requirements | It specifies the test methods and requirements for the mechanical and electrical performance of spark-plugs for spark-ignition engines. | GB/T 7825—2017 | MOD, ISO 11565:2024 | 2026/9/4 |
20255270-T-339 | Test and evaluation method for thermal comfort of vehicles | This standard specifies the test conditions, test methods, and thermal comfort evaluation indicators for conducting thermal comfort tests on complete vehicles. It is applicable to M₁ and N₁ class vehicles, and other vehicle types may refer to it for implementation. | Newly-drafted | N/A | 2026/9/7 |
GB/T 18388-2005 (Amendment 1) | Amendment 1 of Electric vehicles -Engineering approval evaluation program | Modifies clauses 4.1.2, 4.1.3, 4.2.2.1, and 4.3 (Reliability running test) of the original national standard. | GB/T 18388-2005 | N/A | 2026/8/12 |
GB/T 19750-2005 (Amendment 1) | Amendment 1 of Hybrid electric vehicles-Engineering approval evaluation program | Modifies clauses 4.1.2, 4.1.3, 4.2.1, and 4.3 (Reliability running test) of the original national standard. | GB/T 19750-2005 | N/A | 2026/8/12 |
GB/T 39132-2020 (Amendment 1) | Amendment 1 of Fuel cell electric vehicle engineering approval evaluation program | Modifies clauses 5.2.4, 5.3.3.2, 5.3.3.3, and 5.4.2 (Reliability running test) of the original national standard. | GB/T 39132-2020 | N/A | 2026/8/12 |
Although being voluntary, these drafts may also initiate some influence on the sector, first of all, for vehicle manufacturers:
It is advised to watch the future updates of Test methods for extreme environment adaptability of vehicles (20256221‑T‑339) which covers all road vehicle categories and introduces a comprehensive framework for low‑temperature, high‑temperature dry‑heat, high‑temperature humidity, and high‑altitude testing, and 20261033‑T‑339 on the braking system test as it is directly relevant to the type‑approval and periodic inspection of heavy‑duty commercial vehicles (categories M₂, M₃, N₂, N₃, O₃, O₄) by providing a standardized roller‑brake test method.
The three draft amendments to GB/T 18388‑2005, GB/T 19750‑2005, and GB/T 39132‑2020 are also of certain significance, as they align electric vehicle safety requirements with the mandatory GB 18384 and introduce a reliability running test with a 90 % DC‑fast‑charging mileage requirement, which may affect validation protocols for new energy models.
Meanwhile, component suppliers and relevant testing/service organizations are advised to be ware of the potential changes on product specifications and test equipment in Road vehicles - Spark-plugs - Test methods and requirements (20261149‑T‑339) and Test and evaluation method for thermal comfort of automotive air conditioning (20255270‑T‑339), particularly in areas such as sensor accuracy, manikin configuration, and test procedures etc.
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