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Proposal to introduce a “default mode”, to specify requirements to be applied to the emission of Enhanced Exterior Sound (EES), with the corresponding transitional provisions, and to draw a limit curve to introduce electric vehicles and hybrid electric vehicles that can be propelled without an internal combustion engine operating in the scope of ASEP (Annex 7).

Proposal to update references to the latest version of standard ISO 362-3 (Indoor testing).

Proposal to address electric vehicle enhanced sound issues in the short term until the new 04 series of amendments enters into force.

Proposal to replace references to GTR 21 by references to UN R177.

Document includes OICA proposals for three topics.

By this proposal all types of electric vehicles (xEVs) are included in the provisions of ASEP (Annex 7) in UN Regulation No. 51. If applicable, input of the dedicated subgroup of IWG RD-ASEP has been incorporated.

Proposal to make a correction to the procedure of free rolling tyre noise testing described in Annex 8.

Proposal replaces document GRBP/2025/20

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

Proposal to replace ECE/TRANS/WP.29/GRBP/2024/8, applies also to UN R117

Proposal to replace ECE/TRANS/WP.29/GRBP/2025/25

This proposal concerns primarily amendments to Annex 7 of UN Regulation No. 51. The proposed changes are based on the 03 series of amendment to UN Regulation No. 51 up to Supplement 10.

Informal consolidated text for better reading.

This presentation provides information on the term ΔL_ASEP introduced by OICA in its sound level proposal GRBP/2025/20.

Proposal to cover all types of electric vehicles (xEVs) in the provisions of ASEP (Annex 7) in UN Regulation No. 51.

Proposal from the GRBP task force on Automated Vehicles Regulation Screening to enable application of UN R51 to ADS vehicles.

Proposal to replace references to UN GTR 21 by its type-approval equivalent UN R177, provide transitional provisions pursuant to amendments introduced in Supplements 10 and 11, and clarify calibration provisions and procedure for system check (cf: ISO 362).

This proposal concerns primarily amendments to Annex 7 of UN R51. The proposed changes are based on the 03 series of amendment to UN R51 up to Supplement 10.

Initial draft for a proposal to make the requirements of UN R51 fit for the approval of vehicles equipped with Automated Driving Systems.