GAR | UN R137 Frontal Impact ORS

Overseen by GRSP

Series of amendments
Revisions
Contracting Parties
Documents ( 2 Dec 2025)
Meetings ( 3 Feb 2026)

This regulation provides for a full-width rigid barrier frontal impact test to evaluate the performance of occupant restraint systems. Briefly, the test involves a 50 km/h impact of a vehicle equipped with a Hybrid III 50th percentile male driver and an HIII 5th percentile female front passenger. Aimed particularly at reducing injuries to the elderly, the test sets a 42 mm ThCC threshold that will be strengthened to 34 mm for the HIII 5F in 2020 (via the 01 series amendments).

UN R137: Proposal for the 02 series of amendments
Reference Number: WP.29/2020/110
GRSP proposal to align the regulation with post-crash electrical safety requirements of UN GTR 20 and to align the definition of REESS with UN R100.
Meeting Sessions: 182nd WP.29 session (10-12 Nov 2020)
Document date: 20 Aug 20
Document status: Adopted by WP.29
Relevant to UN Regulation No. 137 \| Restraint System in Frontal Impact
Adoption Vote
This proposal (WP.29/2020/110) was adopted by the World Forum. Thirty-eight Contracting Parties out of the 55 applying UN R137 were present for the vote by AC.1. Thirty-seven voted in favor with zero against and one abstaining.
View full document file for more information

UN R137: Proposal for Supplement 1 to the 02 series of amendments
Reference Number: WP.29/2021/64
Proposal to clarify transitional provisions of the 02 series of amendments to UN R137 (document WP.29/2020/110).
Meeting Sessions: 184th WP.29 session (22-24 Jun 2021)
Document date: 09 Apr 21
Document status: Adopted by WP.29
Relevant to UN Regulation No. 137 \| Restraint System in Frontal Impact
Adoption Vote
This proposal (WP.29/2021/64) was adopted by the World Forum. Thirty-nine Contracting Parties out of the 55 applying UN R137 were present for the vote by AC.1. Thirty-seven voted in favor with zero against and two abstaining.
View full document file for more information

UN R137: Proposal for Supplement 2 to the 02 series of amendments
Reference Number: WP.29/2021/125
Proposal from GRSP to clarify the definition of “specific voltage condition”
Meeting Sessions: 185th WP.29 session (23-26 Nov 2021)
Document date: 01 Sep 21
Document status: Adopted by WP.29
Relevant to UN Regulation No. 137 \| Restraint System in Frontal Impact
Adoption Vote
This proposal (WP.29/2021/125) was adopted by the World Forum. Thirty-nine Contracting Parties out of the 55 applying UN R137 were present for the vote by AC.1. Thirty-seven voted in favor with zero against and two abstaining.
View full document file for more information

UN R137: Proposal for Supplement 4 to the 02 series of amendments
Reference Number: WP.29/2023/55
Proposal to reinsert text allowing tolerances on the vehicle mass and simplified testing that was omitted in the 02 series of amendments.
Meeting Sessions: 190th WP.29 session (19-22 Jun 2023)
Document date: 30 Mar 23
Document status: Adopted by WP.29
Relevant to UN Regulation No. 137 \| Restraint System in Frontal Impact
Adoption Vote
This proposal (WP.29/2023/55) was adopted by the World Forum. Thirty-four Contracting Parties out of the 57 applying UN R137 were present for the vote by AC.1. Thirty-four voted in favor with zero against and zero abstaining.
View full document file for more information