Proposal to harmonise and consolidate the regional procedures and limits, update the provisions to align with Euro 7 requirements, including new particle number (PN10) provisions, a new SHED limit for evaporative emissions, updated On-board Fuel Consumption Monitoring provisions, new annexes with requirements relating to in-vehicle battery durability and a new test for range of Pure Electric Vehicles at low temperatures. An informal document amending this proposal is under development.

Proposal drafted after the session to amend UN Regulation No. 154 to insert a new paragraph recognising vehicles of categories X and Y fitted with Automated Driving Systems, amend definitions including “Mass in running order”, “Powered axle”, “Reference mass”, “Driver User-selectable mode”, “Predominant mode”, and “Configurable start mode”, insert new definitions for “ADS road load determination mode” and “ADS testing mode”, amend the On-Board Diagnostic system definition, amend footnotes and tables relating to road load matrix families and OBD families, insert special provisions for vehicles of categories X and Y in road load determination and chassis dynamometer testing procedures, amend provisions for driver reagent warning and inducement systems, amend testing procedures in Annexes relating to pollutant emissions, CO2 emissions, fuel consumption, and electric energy consumption, insert requirements for ADS testing mode and ADS road load determination mode in Annexes A1, B4, B6, C3, and C4, and amend OBD system provisions in Annex C5 to account for ADS operation.

Proposal to introduce provisions relating to Manipulation Devices and Strategies which were previously in the 09 series of amendments to UN R83.

Working Documents for 198th WP.29 session will exclude Level 1C, with editorial corrections merged. Pre-discussion on EU Mega-Decision is scheduled for 2026/1/14, followed by extra GRPE discussion during GRVA week in 2026/1/19–2026/3. A new Supplement 1 to the 04 Series of Amendments to UN Regulation No. 154 will be submitted to 94th GRPE session in 2026/3, with review of applicable Level, manipulation device transfer from UN R83 possibility, and Level 1B transitional provision status. Japan is undertaking precise review on GRPE-93-29 and may provide text proposals for incorporation into the Informal Document.

In-session changes to original version.

Document presents concerns regarding an OICA proposal to introduce a new Level of Approval (Level 1C) to UN R154 to recognise EU small volume manufacturer provisions. The proposal would exclude technical requirements regarding OBFCM, incorporate OBM and EEEDWS into a new UN Regulation, add allowances to replace Type Approval tests with manufacturer declarations, and include exemption from Conformity of Production testing. Japan expressed a reservation concerning this concept. A process was agreed whereby OICA will draft a question to WP.29 and Japan will draft an explanation of their reservation.

Proposal to introduce new ⁰⁴ series of amendments to UN Regulation No. 154 establishing uniform provisions for approval of light-duty vehicles regarding emissions, carbon dioxide, fuel consumption, and electric energy consumption and range, adding requirements for State-of-Certified Range and State-of-Certified Energy monitors, Minimum Performance Requirements for batteries of OVC-HEV and PEV vehicles of categories M₁ and N₁, verification procedures for battery durability compliance, low temperature electric range testing, and updated On-Board Fuel Consumption Monitoring provisions, organized into three approval levels designated Level 1A, Level 1B, and Level 2, with Level 1A and Level 1B covering regional requirements not requiring mutual recognition and Level 2 containing harmonised procedures subject to full mutual recognition by all Contracting Parties.

UN R154 specifies unique identifiers for vehicle families in the format FT-nnnnnnnnnnnnnnn-WMI, where FT designates family type: IP for Interpolation family, RL for Road load family, RM for Road load matrix family, PR for Periodically regenerating systems family, AT for ATCT family, EV for Evaporative emissions family, DF for Durability family, OB for OBD family, ER for Exhaust after-treatment system using reagent family, GV for Gas Fuelled Vehicle family, KC for KCO₂ correction factor family, RT for Low temperature range family, MF for Monitor family, BD for Battery Durability family, VD for virtual distance family, and LP for Lower limit pressure family. The document establishes reporting requirements for fuel consumption, electric energy consumption, and fuel efficiency for various vehicle types including OVC-FCHVs and NOVC-FCHVs, with driving range of hydrogen calculated according to specified procedures.

Proposal to amend Annex B4, para. 6.2.1. to specify that three vehicles selected by the responsible authority shall cover the range of vehicles planned to be measured, and that each change of range requires new selection, but original measurements can be re-used if a vehicle is reselected, and amend para. 6.2.4. to establish approval criteria requiring the difference in cycle energy between wind tunnel method and coastdown method to be within 0.05 for each of three vehicles and within 0.02 for arithmetic average, to require approval recording, to permit facility use for two years with extension every two years upon manufacturer evidence of modifications, measurement results at three-month intervals meeting repeatability and force measurement accuracy requirements, and to require separate approval for each roller chassis dynamometer or moving belt and wind tunnel combination and each combination of wind speeds used.

Proposal to introduce new regional requirements from Contracting Parties, in particular from Euro 7 in the EU, including new particle number (PN10) provisions, a new SHED limit for evaporative emissions, updated On-board Fuel Consumption Monitoring provisions, and new annexes with requirements relating to in-vehicle battery durability and a new test for range of Pure Electric Vehicles at low temperatures for UN R154 (Worldwide harmonized Light vehicles Test Procedures (WLTP)).

Devices for monitoring on-board vehicle consumption of fuel and/or electric energy shall determine and store lifetime values of fuel consumed, distance travelled, and energy parameters specified in Appendix 5. Type-approval requires testing per Table A according to vehicle category and fuel type, including Type 1 emissions tests, evaporative emissions tests, durability, OBD checks, and OBFCM accuracy verification. Manufacturers must ensure OBFCM accuracy between −0.05 and +0.05 calculated using specified formulae comparing WLTP-determined and OBFCM-measured consumption. Conformity of production requires periodic testing and audits. Lifetime counter values shall be preserved from 1 January 2029 for new vehicle types; from 1 January 2030, type approvals for non-compliant vehicles shall not be accepted. OBFCM devices must provide standardised, unrestricted access to information via specified ISO and SAE standards.

Proposal to amend UN R154 road load determination procedures by introducing an optional calculation method for road load coefficients based on component dynamometer measurements from two reference vehicles, establishing boundary conditions permitting up to 300 kg vehicle weight difference and unlimited aerodynamic configuration variation, and allowing optional calculation of the linear coefficient f₁ using the mean value of measurements from both vehicles to reduce measurement uncertainties.

Proposal to amend Annex B4, para. 4.2.1.1.1. to specify vehicle H selection without interpolation based on highest cycle energy demand and wheel selection criteria, amend para. 4.2.1.1.2. to permit optional interpolation method using two test vehicles or one vehicle tested twice with specified configurations, amend para. 4.2.1.5. to specify operation of movable aerodynamic body parts during road load determination, amend para. 4.2.2.1. to establish tyre rolling resistance measurement according to UN R117 02 series amendments and introduce Table A4/2 with rolling resistance classes and coefficients for C1, C2 and C3 tyres, amend para. 4.3.1.4.3. to establish rejection criteria for road load measurements not exceeding one-third of total measurement pairs and data evaluation procedures, amend para. 6. heading to include optional procedures for road load determination and calculation, amend para. 6.8. to permit optional measurement of friction differences on component or suitable dynamometer, add new paras. 6.9. to 6.10.1.1. to establish component dynamometer test procedures and optional calculation method for road load based on base vehicle measurement and technical vehicle parameters, and amend Annex B7 paras. 3.2.3.2.2.2.2. and 3.2.3.2.2.4. to reference Table A4/2 rolling resistance classes and permit optional calculation using actual tyre rolling resistance values.

Proposal to align the manufacturer information document with the type-approval
certificate and to clarify that compliance with a limit measured according to PN10 demonstrates compliance with the same limit according to PN23.

Proposal to amend additive deterioration factors and the PEV run-in requirement, to align the manufacturer information document with the type-approval certificate, to clarify that compliance with a limit when measured according to PN10 demonstrates compliance with the same limit according to PN23, and to effect corrections and editorial improvements.

Proposal to align the manufacturer information document with the type-approval certificate, make corrections, clarifications and improvements that have already been introduced into the 02 and 03 series of amendments of UN R154, and clarify that compliance with a limit measured according to PN10 demonstrates compliance with the same limit according to PN23.

Consolidated revision to make corrections, clarifications and improvements that have already been introduced into the 02 and 03 series of amendments of UN R154. The proposal is based on document GRPE/2024/2, GRPE-90-11-Rev.1, and GRPE-91-11 PEV run-in provisions only). Proposal to align the manufacturer information document with the type-approval certificate, adapt the calibration of measurement equipment to PN10 (which measures more particles than PN23), and clarify that compliance when measured according to PN10 demonstrates compliance with the same limit according to PN23.