Home/Resources/Regulation Library/R-165
ECE R-165
Audible Reverse Warning Signals Part I
Applies to
M, N
Topic
Lighting & signalling
Framework
UN ECE
Velocert services
European
Overview
UN Regulation No 165 lays down uniform provisions for the approval of audible reverse warning devices and of motor vehicles with regard to their audible reverse warning signals. Part I covers the approval of devices emitting an acoustic signal outside the vehicle while reversing, and Part II the fitting of those devices to vehicles.
This summary is based on the original version of the UN text (2023), which is the current series. GlobalAutoRegs also lists Supplements 1 and 2 with no entry-into-force date. Checked on GlobalAutoRegs, 1 November 2026. For the current text, see the UN (UNECE) page.
Scope
Part I applies to devices intended for motor vehicles of categories M2 (above 3 500 kg), M3, N2 and N3. Part II applies to those vehicles with regard to fitting devices that activate automatically when reverse gear is selected and the propulsion system is on.
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