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ECE R-51
Sound Emissions
Uniform provisions concerning the approval of sound emissions. Summary for orientation; the official text prevails.
Applies to
M, N, O
Topic
Emissions & sound
Framework
UN ECE · EU
Velocert services
Series · Individual
Overview
This regulation defines limits and test procedures for emissions, fuel consumption, sound levels or power measurement.
Approval is based on laboratory or track tests performed under the conditions defined by the regulation.
Scope
The regulation applies to the following vehicle categories:
M
Passenger vehicles
N
Goods vehicles
O
Trailers and semi-trailers
Key requirements
Test procedure
Tests performed on the cycle or track conditions defined by the regulation.
Limits
Measured values checked against the applicable limit values.
Documentation
Technical specifications and calibration data reviewed.
Conformity
Production conformity provisions confirmed with the manufacturer.
Timeline
Adopted
Regulation in force under the UN ECE framework
Ongoing
Amendments and supplements published by WP.29
Project start
Applicable series confirmed during the scope call
Approval with Velocert
Velocert plans and witnesses the required tests and prepares the technical report for the approval authority.
This page is a summary for orientation only. Always refer to the official UNECE text and its amendments for legal requirements.