WP.29 184th session: amendments to UN Regulations
22–24 June 2021
Amendments to UN Regulations that the WP.29 documents submitted for the vote at the 184th session. Each change report shows what changes, why, and who is affected.
This list has the 17 amendments with a RegVault change report, in 14 regulations. It is not the full agenda of the session.
UN R13H — Braking of passenger cars
- 01 series — Supplement 3
For deceleration by automatically commanded and/or regenerative braking, the braking signal may be generated up to 1.3 m/s² and must be generated above it.
UN R24 — Visible pollutants, measurement of power of C.I. engines (Diesel smoke)
- 03 series — Supplement 6
An approval to the 06 and above series of UN Regulation No. 49 is considered to demonstrate compliance for visible pollutants (para. 1.1.4.).
UN R30 — Tyres for passenger cars and their trailers
- 02 series — Supplement 24
In the “flat tyre running mode” procedures of Annex 7, paragraphs 3.2. and 4.2. now set an inflation pressure of 2.5 bar for conditioning.
UN R41 — Noise emissions of motorcycles
- 05 series — Supplement 1
Paragraphs 5.5.2. and 5.6. now refer to paragraph 5.5.1. instead of paragraph 5.4.1.
- 04 series — Supplement 10
Paragraphs 5.5.2. and 5.6. now refer to paragraph 5.5.1. instead of paragraph 5.4.1.
UN R49 — Emissions of C.I. and P.I. (LPG and CNG) engines
- 07 series — Base text
Cold start emissions must now be included in the emissions evaluation of the Annex 8 test (para. 4.6.2.).
UN R79 — Steering equipment
- 04 series — Base text
New paragraph 5.1.6.3. sets requirements for a Risk Mitigation Function (RMF), an emergency function for the event that the driver becomes unresponsive.
- 03 series — Supplement 5
Paragraph 5.6.4.1.2. adds an exception to the lane centring aim of ACSF of Category B1 when ACSF of Category C is in standby mode.
UN R83 — Emissions of M1 and N1 vehicles
- 07 series — Supplement 13
For paragraph 6.2. of Appendix 6, the situations are now presumed to occur if the applicable NOx OBD threshold limit in Annex 11 is exceeded.
- 06 series — Supplement 16
In Annex 4a, Appendix 7b, the formula for the effect of different tyre tread depth now subtracts TTD instead of multiplying by it.
UN R95 — Lateral collision protection
- 05 series — Supplement 1
From 1 September 2023, Contracting Parties are not obliged to accept type-approvals of vehicles to the preceding series first issued after that date (para. 11.2.).
UN R101 — CO2 emission/fuel consumption
- 01 series — Supplement 10
Annex 7, Appendix 2 changes when the manufacturer may choose its road load power calculation method. The new condition is that the vehicle road load has been determined according to WLTP procedures as defined in UN GTR No. 15.
UN R124 — Replacement wheels for passenger cars
- 00 series — Supplement 3
The Regulation does not apply to wheels with less than three-wheel fixing components (studs or nuts) which are not identical replacement wheels.
UN R129 — Enhanced Child Restraint Systems (ECRS)
- 03 series — Supplement 5
The information for use can now be given in a digital form, which must also fulfil paragraph 14.4. on a paper quick-start guide.
UN R134 — Hydrogen and Fuel Cell Vehicles (HFCV)
- 01 series — Base text
New paragraph 7.1.7. requires labels as specified in Annex 6 on M2/N2 and M3/N3 vehicles equipped with a compressed hydrogen system.
UN R137 — Restraint system in front impact
- 02 series — Supplement 1
From 1 September 2023, Contracting Parties are not obliged to accept type-approvals of vehicles to the preceding series first issued after that date (para. 12.2.).
UN R157 — Automated Lane Keeping Systems (ALKS)
- 00 series — Supplement 2
New paragraph 9.3.1.1. requires an R157SWIN to identify the software of the System, as the Software Update and Software Update Management System Regulation specifies.