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ECE R-137
Frontal Impact with Focus on Restraint Systems
Applies to
M, N
Topic
Occupant safety
Framework
UN ECE
Velocert services
European
Overview
UN Regulation No 137 lays down uniform provisions for the approval of vehicles in the event of a frontal collision, with a focus on the restraint system. It also covers instructions for users of vehicles equipped with airbags; its annexes cover the test procedure, performance criteria and the installation of dummies.
Current series: 04 series (in force 12 June 2025); this summary is based on the version published on EUR-Lex, 02 series (2021). GlobalAutoRegs also lists Supplement 1 to the 04 series with no entry-into-force date. Checked on GlobalAutoRegs, 1 November 2026. For the current text, see the UN (UNECE) page.
Scope
It applies to vehicles of category M1 with a maximum permissible mass not exceeding 3 500 kg and to vehicles of category N1.
The regulation applies to the following vehicle categories:
M
Passenger vehicles
N
Goods vehicles
Official source
For the requirements of this regulation, refer to the official text in force and its amendments.
Official UNECE text