UN R79 Supplement 17 (03 series) · UNECE Regulation No. 79 (ECE R79) — Uniform provisions concerning the approval of vehicles with regard to steering equipment.
UN R79 — Supplement 17 to the 03 series of amendments
Supplement 16 → 17
- What changed
- Paragraph 6.1.1. now requires an ambient temperature between 0 °C and 45 °C for the test.
- Paragraph 5.3.3.2. now refers to paragraph 5.3.1.1. instead of paragraph 5.1.4.
- Why
- GRVA chose to clarify the test conditions instead of the first proposal for pre-test conditions.
- The change to paragraph 5.3.3.2. includes a correction from China.
Q1What changed2 changes
Ambient temperature for the test (para. 6.1.1.)
The test must now be done at an ambient temperature between 0 °C and 45 °C. At the request of the manufacturer and with the agreement of the Technical Service, the test may be done above or below this temperature. The performance requirements must still be met. Before this supplement, paragraph 6.1.1. gave only the level surface with good adhesion.
Reference for parts excluded after a failure (para. 5.3.3.2.)
Paragraph 5.3.3.2. now excludes the parts listed in paragraph 5.3.1.1. Before this supplement, it referred to paragraph 5.1.4. The rest of the paragraph does not change.
Q2Why it changed
- Proposed by
- Experts from the Republic of Korea (paragraph 6.1.1.) and expert from China (paragraph 5.3.3.2.)
- Working party
- GRVA, 25th session (June 2026)
Reasons
GRVA chose to clarify the test conditions instead of the first proposal for pre-test conditions.
Sources (2)
“which originally proposed pre-test conditions for measuring steering effort under a failure condition in UN Regulation No. 79”
“The experts preferred to clarify the testing conditions to address the issue”
The change to paragraph 5.3.3.2. includes a correction from China.
Source
“drafted GRVA-25-53/Rev.1, incorporating the correction contained in GRVA-25-38.”
Proposer's reason (informal document GRVA-25-53-Rev.1)
The new text of paragraph 6.1.1. is based on the existing provision in Annex 8, with changes for the steering effort test.
Submitted by Experts from the Republic of Korea. Working party adoption: ECE/TRANS/WP.29/GRVA/25, para. 47.
Source
“This amendment is based on the existing provision in Annex 8, with modifications to make it appropriate for the steering effort test”
Document trail
- 2026-04ProposalECE/TRANS/WP.29/GRVA/2026/19Proposal from the Republic of Korea
- —ProposalGRVA-25-38Correction proposal from China for paragraph 5.3.3.2.
- —RevisedGRVA-25-53-Rev.1Revised proposal with the new text of paragraphs 5.3.3.2. and 6.1.1.
- —Working party adoptsECE/TRANS/WP.29/GRVA/25Session report, para. 47
- 2026-09Sent to WP.29ECE/TRANS/WP.29/2026/186Text that GRVA sent to WP.29 and AC.1
- PendingWP.29 voteScheduled for the 200th session (17–20 November 2026)
- PendingIn forceDate not yet known
Q3Who is affected
Vehicle manufacturer
- Make sure the test of paragraph 6.1.1. is done at an ambient temperature between 0 °C and 45 °C.
- To test above or below this temperature, ask the Technical Service for agreement.
- Check that your documents use paragraph 5.3.1.1. for the parts excluded in paragraph 5.3.3.2.
Component supplier
- No direct action for this role.
Technical service / Approval authority
- Check the ambient temperature of the test against paragraph 6.1.1.
- For a test above or below this temperature, check that the performance requirements are still met.
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