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GRBP-82-23

UN R51: Proposal for correction to 03 series of amendments

Source(s)

OICA

Date

1 Sep 2025

Status

Approved by GR

Subject

UN R51 Vehicle Noise

Meeting(s)

GRBP | Session 82 | 3-5 Sep 2025

Agenda item 3. UN Regulation No. 51 (Noise of M and N Categories of Vehicles)

Supplement 7 introduced an inconsistency in R51.03 Annex 8. As currently
written, it requires free-rolling tyre noise testing to be conducted in
accordance with both ISO 362-3:2016 and Annex 3, Appendix 3

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Excerpts from session reports

GRBP | Session 82 | 3-5 Sep 2025

8. The expert from OICA also proposed clarifications and corrections for UN Regulation No. 51 (ECE/TRANS/WP.29/GRBP/2025/20 as amended by GRBP-82-07, GRBP-82-22, GRBP-82-23). GRBP adopted these proposals as part of draft Supplement 11 to the 03 series of amendments to UN Regulation No. 51 and agreed to freeze it for the time being, awaiting other amendment proposals before transmission to WP.29 and AC.1.