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ECE R-163
Vehicle Alarm Systems
Applies to
M, N
Topic
Cyber & software
Framework
UN ECE
Velocert services
European
Overview
UN Regulation No 163 lays down uniform provisions for the approval of vehicle alarm systems and of vehicles with regard to their alarm system. Its annexes cover specifications for mechanical key switches, electromagnetic compatibility, and the test of systems protecting the passenger compartment.
Current series: the original version, Supplement 3 (in force 26 September 2025); this summary is based on the version published on EUR-Lex, the original version (2021). GlobalAutoRegs also lists Supplement 4 with no entry-into-force date. Checked on GlobalAutoRegs, 1 November 2026. For the current text, see the UN (UNECE) page.
Scope
It applies, where fitted, to alarm systems primarily dedicated to vehicles of category M1 and of category N1 with a maximum mass of not more than 2 tonnes, and to those vehicles. At the manufacturer's request, approvals may be granted for other categories. It does not apply to radio transmission frequencies.
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