Proposal to revise definitions for malfunction indication, reference mass, unladen mass, and vehicle user; add provisions for vehicles equipped with an Automated Driving System; establish documentation requirements for vehicle user warning and inducement systems; update testing procedures for in-service conformity and OBD connector location; and specify activation and deactivation mechanisms for vehicle user warning and inducement systems across multiple annexes, with references to WP.29/1045.

Proposal to update UN R49 to accommodate Automated Driving Systems (ADS). The supplement modifies definitions, mass calculations, warning systems, and testing procedures to apply to vehicles without human drivers. References to drivers are replaced with “vehicle user” terminology, and special provisions are added for ADS-equipped vehicles in testing and operational requirements.

Proposal to improve FTIR/QCL Analyser Examination (Para. 9.3.2.8.1, 9.3.2.9.1, 9.3.2.10, Appendices 10–11), including expanding the examination authority to include type-approval authorities and technical services, requiring witnessing of the testing at the instrument manufacturer’s facility, and introducing new appendices providing an examiner template and a verification certificate format, and to permit other techniques for the water quench check (Para. 9.3.2.9.9) to address the adverse effects of H₂O and CO₂ on the CLD’s NOx response and align with the provisions of 40 CFR 1065.750(e)(5).

Proposal to enable application of the Regulation to vehicles equipped with an Automated Driving System.

Proposal to reintroduce text that was unintentionally omitted in document GRPE/2025/12 as adopted by GRPE during its 92nd session.

Updated version with in-session revisions.

Proposal to correct document WP.29/2025/94.

In-session changes to original document.

Proposal for amendments to include OBFCM provisions

Proposal for the transposition of Euro 7 HDV provisions into UN R49

Proposal to introduce new provisions to accommodate type-approval of hydrogen Type 1A dual fuel engines and vehicles, modifications to include Fourier Transform Infrared (FTIR) and Quantum Cascade Laser (QCL) instruments, new provisions to accommodate monitoring on-board fuel and/or energy consumption during PEMS testing, and to amend for consistency between UN R49 and UN R83 in light of amendments to the 06 and 07 series of UN R83.

Proposal to maintain consistency between UN R49 and UN R83 in light of amendments to the 06 and 07 series of UN R83.

Proposal to maintain consistency between UN R49 and UN R83 in light of amendments to the 06 and 07 series of UN R83.

Proposal to introduce new provisions to accommodate type-approval of hydrogen Type 1A dual fuel engines and vehicles, modifications to include Fourier Transform Infrared (FTIR) and Quantum Cascade Laser (QCL) instruments and new provisions to accommodate monitoring on-board fuel and/or energy consumption during PEMS testing.

Proposal to remove additions to non-existing part of the 06 series of amendments (delete the PEMS PM number).

Proposal to delete the PEMS PM number from 06 series of amendments.

Proposal should enable the relevant OBFCM (on-board fuel and/or energy consumption monitoring )data to be collected during the PEMS.

Hydrogen mono-fuel engines and vehicles are already covered, however hydrogen dual-fuel engines and vehicles are not yet possible to be type-approved. This proposal introduces the requirements to accommodate type-approval of Type 1A hydrogen dual-fuel, as done for hydrogen mono-fuel.

Proposal to remove additions to non-existing part of the 06 series of amendments

Proposal aims to clarify the measurement data.

Proposal to permit the use of hydrogen (H2) as fuel for emissions type-approval of heavy duty vehicles and to introduce an option to measure the total hydrocarbon (THC) emissions instead of measuring the non-methane hydrocarbon emissions in certain cases.

Proposal to permit the use of hydrogen (H2) as fuel for emissions type-approval of heavy duty vehicles.

Proposal to permit the use of hydrogen (H2) as fuel for emissions type-approval of heavy duty vehicles.

Proposal to permit the use of hydrogen (H2) as fuel for emissions type-approval of heavy duty vehicles and to introduce an option to measure the total hydrocarbon (THC) emissions instead of measuring the non-methane hydrocarbon emissions in certain cases.

Proposal to permit the use of hydrogen (H2) as fuel for emissions type approval of heavy-duty vehicles.

Proposal to permit the use of hydrogen (H2) as fuel for emissions type approval of heavy-duty vehicles.

Proposal to correct drafting errors in the text.

Proposal to permit the use of hydrogen (H2) as fuel for emissions type approval of heavy-duty vehicles, to insert provisions in Supplement 7 to the 06 series that were unintentionally omitted, to add a requirement for the accuracy of the humidity sensor, correct a typographical error (NOx mode), and to clarify the procedures.

Proposal based on ECE/TRANS/WP.29/GRPE/2021/14, as amended by Annex X of the report of the 83rd GRPE (Supplement 7 to the 06 series of amendments). Some modifications were not taken onboard in the 07 series of amendments (and Supplements 1, 2 and 3). For the remaining amendments included in this proposal, the justifications are:

1. UN R49 does not define linearity requirements for humidity sensors. As the humidity content of the intake air is an essential measure for the calculation of the specific exhaust emission, it is important to add requirement for humidity sensor. Reference: ISO 16183 the accuracy of the absolute humidity shall be +- 5%.
2. Typo error: the instrument should be now in NOx mode.
3. To clarify the operation procedure, make the text easier to be understood.

Background on changes proposed to UN R49 and UN R85 to address hydrogen fuel and heavy vehicles.

Proposal to correct drafting errors within the 06 and 07 series of amendments.

Proposal to permit the use of hydrogen (H2) as fuel for emissions type approval of heavy-duty vehicles.

Also applicable for R85

Proposal from GRPE to introduce provisions for the approval of a vehicle type with an approved engine with regard to their emission of pollutants, and the reporting of the CO2 emissions and fuel consumption for type approval of vehicles with a reference mass exceeding 2,380 kg but not exceeding 2,610 kg.

Proposal to allow for the use of hydrogen (H2) as fuel for emissions type approval of heavy-duty vehicles.

Proposal to introduce provisions for the approval of a vehicle type with an approved engine with regard to their emission of pollutants, and the reporting of the CO2 emissions and fuel consumption for type approval of vehicles with a reference mass exceeding 2,380 kg but not exceeding 2,610 kg.

Proposal from GRPE to correct and improve provisions with respect to humidity and hydrocarbon measurements.

Proposal from GRPE to correct and clarify the text and to introduce linearity requirements for humidity sensors to address humidity content measurement for the calculation of the specific exhaust emission.

Proposal to introduce new requirements relating to Auxiliary Emission Strategies, cold engine starts and the use of Portable Emissions Measurement Systems (PEMS) to measure particle numbers.

Proposes to allow the use of nitrogen as batch gas for FID fuel gas and introduces the requirements for humidity sensors.

Proposal to correct and clarify the text and to introduce linearity requirements for humidity sensors to address humidity content measurement for the calculation of the specific exhaust emission.

Proposes updates and amendments to proposal to introduce new requirements relating to Auxiliary Emission Strategies, cold engine starts and the use of Portable Emissions Measurement Systems (PEMS) to measure particle numbers

Proposes the modifications (essentially corrections of mistakes) are derived from the text of document ECE/TRANS/WP.29/GRPE/2021/7 from Japan, related to UN GTR 04, as modified by Informal Document GRPE- 82-09

Proposal makes changes to take into consideration the availability of gases for flame ionization detectors and the linearization of the gas analyzer.
UN R49 defines no linearity requirements for humidity sensors. As the humidity content of the intake air is an essential measure for the calculation of the specific exhaust emission, it is important to add requirement for humidity sensor (Reference: ISO 16183 the accuracy of the absolute humidity shall be +- 5%).

As the gas divider is a necessary tool to verify the linearization of the gas analyzer it is mandatory that the deviation of the gas divider is lower than that of the instrument under test. In combination with a calibration gas which has an accuracy of 1 % and a gas divider, which has an accuracy of 1 % it is only possible to reach a guaranteed analyzer accuracy of 2 %.

In the automotive industry Helium is used as so fuel gas for flame ionization detectors (FID) to measure Hydrocarbon emissions. In the FID fuel gas Helium is mixed with Hydrogen in a ratio of 40 % H2 and 60 % He. The annual fluctuations of the helium global market lead to an insufficient supply with FID fuel gas, like happened lately during summer 2018. In order to prevent the industry from the fluctuations of the global helium market, the US legislation reacted already in 2014 and allowed the usage of Nitrogen as batch gas for the FID fuel gas.

Proposal to introduce new requirements relating to Auxiliary Emission Strategies, cold engine starts and the use of Portable Emissions Measurement Systems (PEMS) to measure particle numbers.

Proposal to update the PMP mandate with a view to delivering the following results:

• Proposal for a new methodology for exhaust PN measurement with a d50 cut-off size reduced to 10 nm: June 2020
• Proposal for HD raw exhaust PN sampling and extension of sub-23 nm procedure to HD engines: January 2021
• Proposal for LD PN-PEMS 10 nm specifications : June 2021 (tbc)
• Proposal for a common test procedure for the measurement of particle brake emissions from conventional ICE LDVs: December 2021.

Presentation of PTI Informal Group interest in investigation tampering and fraud involving Exhaust Gas Recirculation (EGR), Diesel Particulate Filter (DPF), and Selective Catalytic Reduction (SCR) devices/systems.

Proposal to update the scope of the PTI informal group activities to cover new subjects, including diesel emissions system tampering and automated vehicle in-use performance.

Vehicle emission after-treatment system tampering and manipulation-Request for guidance on standardisation of eOBD data related to the urea system sensor

Proposal to improve the “random check requirement” and define the rounding of test results calculated according to Annex 4A in the 05 series of amendments.

Proposal to improve the Engine Control Unit (ECU) torque signal validation requirement in the 06 series of amendments to R49 with regard to dual-fuel or flex-fuel vehicles. Under the regulation, the ECU torque information can be calibrated only to one fuel’s heat value (usually the basic reference fuel) even though the heat value of the alternative fuel is different. In order to increase the accuracy of the torque values used for calculating the emission results during in-service conformity testing, OICA proposes to change the provisions to either:

1. Demonstrate that both fuels comply because the ODB system is able to detect the fuel used, or
2. Determine the torque deviation caused by the alternative fuel heat value compared to the standard fuel and apply this correction factor to calculate a more accurate power signal for the emission calculation.

EC proposals regarding the OICA proposal on the UN R49.06 ECU torque signal validation requirement and dual-fuel or flex-fuel vehicles.

Proposal to improve the Engine Control Unit (ECU) torque signal validation requirement in the 06 series of amendments to R49 with regard to dual-fuel or flex-fuel vehicles. Under the regulation, the ECU torque information can be calibrated only to one fuel’s heat value (usually the basic reference fuel) even though the heat value of the alternative fuel is different. In order to increase the accuracy of the torque values used for calculating the emission results during in-service conformity testing, OICA proposes to change the provisions to either:

1. Demonstrate that both fuels comply because the ODB system is able to detect the fuel used, or
2. Determine the torque deviation caused by the alternative fuel heat value compared to the standard fuel and apply this correction factor to calculate a more accurate power signal for the emission calculation.

Proposal to improve the “random check requirement” and define the rounding of test results calculated according to Annex 4A in the 05 series of amendments.

Proposal to correct and clarify the text, including to

1. correct the constants for equation (34) to calculate exhaust mass flow using carbon balance method,
2. correct constants used for CVS verification,
3. correct the formula for regression analysis according to Annex 4, Appendix 3, and
4. correct the rise time (to 3.5 s from 2.5 s) for the PEM analyzers under paragraph A.2.2.1. of the 06 series.

Proposal to introduce provisions to align UN R49 with recently introduced stage D EU legislation in order enable manufacturers to continue to utilize the provisions in paragraph 4 of Annex 9A to approve light commercial vehicles with a light duty OBD architecture under this regulation. This proposal incorporates all of the provisions of the latest amendment to EU legislation. As stage D is unrelated to OBD, the proposal is to make stage C and all subsequent stages equivalent to EOBD 6-2. The proposal corrects

1. the constants for equation (34) to calculate exhaust mass flow using carbon balance method,
2. the constants used for CVS verification,
3. the formula for regression analysis according to Annex 4, Appendix 3, and
4. the rise time (to 3.5 s from 2.5 s) for the PEM analyzers under paragraph A.2.2.1. of the 06 series.

Amendments as approved by the GRPE for submission to the World Forum for adoption.

Information on Swiss detection of significant deactivation of Ad Blue diesel emissions reduction systems on EURO V vehicles (no EURO VI manipulated vehicles have been found to date).

Amendments from OICA to the proposal to introduce provisions to align UN R49 with recently introduced stage D EU legislation in order enable manufacturers to continue to utilize the provisions in paragraph 4 of Annex 9A to approve light commercial vehicles with a light duty OBD architecture under this regulation.

OICA proposal to include the alignment of the amendment of EU Euro VI legislation (Reg. EU 2014/133) into the Regulation No. 49 which has not been covered before. Reg. EU 2014/133 corrects applicability of OBD threshold levels (OTLs) to all types of vehicles covered by the regulation by removing the reference to vehicle classes and weights.

Swiss report on circumvention of pollution-control systems through the use of aftermarket AdBlue emulators that stop AdBlue injection while preventing detection of the failure by the engine management system.

Proposal to ensure that all replacement pollution control devices conform with the intent of UN R49 and to align UN R49 in this regard with Regulation (EU) 2016/1718. CLEPA proposes the establishment of a new annex under UN R49-05 R.49-05 to restrict the approval of a replacement device to one that “enables the engine and vehicle to comply with the rules with which it was originally in compliance”.

Proposal to correct and clarify the text, including to

1. correct the constants for equation (34) to calculate exhaust mass flow using carbon balance method,
2. correct constants used for CVS verification,
3. correct the formula for regression analysis according to Annex 4, Appendix 3, and
4. correct the rise time (to 3.5 s from 2.5 s) for the PEM analyzers under paragraph A.2.2.1. of the 06 series.

Comprehensive amendment of document GRPE/2017/6 to align UN R49 with the latest amendments of EU Euro VI legislation (Reg. EU 2016/1718), including

1. OBD equivalency option for light commercial vehicles to be continued with step ‘D’,
2. editorial corrections (incl. keeping optional THC PEMS measurement for gas engines),
3. implementation dates in Appendix 9 table 1 (2016/1718) and Annex 3 table 1 (R49),
4. implement rejection note for retroactive applicability with regard to in-service conformity (paragraph 13.4.),
clarification of type approval provisions for ‘new vehicle types as of 2017’,
5. deletion of infeasible requirement related to the PEMS test (“…void if … no valid windows left in urban only”), second part of sentence in Annex 8, Appendix 1: A1.4.2.2.2.2.
6. deletion of inconsistency between work based window and CO2 mass based method regarding valid integration windows (A.1.4.2.2.2.2. versus A.1.4.3.1.2.2).

Proposal to introduce provisions to align UN R49 with recently introduced stage D EU legislation in order enable manufacturers to continue to utilize the provisions in paragraph 4 of Annex 9A to approve light commercial vehicles with a light duty OBD architecture under this regulation. This proposal incorporates all of the provisions of the latest amendment to EU legislation. As stage D is unrelated to OBD, the proposal is to make stage C and all subsequent stages equivalent to EOBD 6-2.

Presentation on the background and accomplishments of the GFV informal group from January 2008 to June 2016 as the group concludes its final effort on heavy-duty dual fuel engine retrofit systems.

Presentation of issues raised during discussions of the GRE Task Force on EMC requirements with regard to the application of several UN Regulations to trolley buses depending upon their configuration (e.g., dual-mode operation either connected to overhead cables or in standard bus mode).

Proposal to align the requirements related to measurement equipment linearity verification in Regulation No. 49 to the provisions in Regulation No. 96.

Proposal to

• align the requirements related to measurement equipment linearity verification with the Regulation No. 96,
• adapt the requirements related to fuel injection malfunction monitoring (On-Board Diagnostic systems) to the current state of technology, and
• correct the documentation requirements for off-cycle emissions.

Proposal to clarify Annex 10, paragraph 11 with respect to the “formal documentation package” according to paragraph 5.1.4.2. and the “extended documentation package” described in paragraph 5.1.4.3.

Proposal to add the condition “when the engine is equipped with the appropriate sensors” with regard to OBD fuel injection monitoring, aligning the text with that used in GTR No. 5.

Proposal to align the requirements related to measurement equipment linearity verification in Regulation No. 49 to the provisions in Regulation No. 96.

Proposal to adapt the requirements related to fuel injection malfunction monitoring (On-Board Diagnostic systems) to the current state of technology.

Proposal to correct the documentation requirements for off-cycle emissions.

Summary from the GRPE secretariat’s review of Revision 7 (all valid text up to and including Supplement 7 to the 05 series of amendment) to UN Regulation 49 proposing issues with the proposed text requiring attention.

Proposal to align the requirements related to measurement equipment linearity verification in Regulation No. 49 with the provisions in Regulation No. 96.

Proposal to adapt the requirements related to fuel injection malfunction monitoring (OBD) to the current state of technology. The current requirements are kept as an option left to those manufacturers that have already agreed with their approval authority to implement a monitoring solution that differs from that specified in this proposal.

Proposal to adapt certain requirements to the current state of technology and to transpose the latest decisions of the European Union (EU) regarding on-board diagnostics (OBD) threshold limits.

This proposal aligns the transitional provisions of Revision 6 of UN Regulation 49 and thus in document GRPE/2014/3 with the General Guidelines for UN Regulations (WP.29/1044/Rev.1). This change requires changes to Table 1 of Annex 3 to cover diesel and dual-fuel engines bearing the letter B.

The proposal also would allow for methods other than monitoring the reagent tank level or reagent flow in order to monitor reagent consumption in Annex 11.

Consolidation of documents GRPE/2015/3 (proposal to adapt requirements to the current technology and to transpose the latest decisions of the European Union (EU) regarding on-board diagnosis (OBD) threshold limits) and GRPE-70-06 (concerning transition provisions and reagent consumption monitoring methods).

Supporting information concerning documents GRPE/2015/3, GRPE-70-06, and GRPE-70-07 (Proposal from the International Organization of Motor Vehicle Manufacturers (OICA) to adapt certain requirements to the current state of technology and to transpose the latest decisions of the European Union (EU) regarding on-board diagnosis (OBD) threshold limits).

Proposal from the International Organization of Motor Vehicle Manufacturers (OICA) to adapt certain requirements to the current state of technology and to transpose the latest decisions of the European Union (EU) regarding on-board diagnosis (OBD) threshold limits.

Proposal by the WP.29 secretariat for an editorial correction to align the text with current drafting guidelines.

Proposal to (i) harmonize the provisions of UN R49 for On-board Diagnostics (OBD) Threshold Limits (OTLs) with those of the EU, (ii) delete the urea consumption motoring obligation and improve definitions, (iii) modify the operating sequence definition for stop-start and hybrid vehicles and (iv) introduce an alternative service mode for LNG dual-fuel vehicles.

Adopted amendments to UN R49.

This document is a consolidated text that includes the proposals of the GRPE working document GRPE/2014/12, the proposals of the informal document GRPE-69-07/Rev.1 and the comments to these documents as received from the contracting parties during GRPE 69 session.

Presentation on the Climate and Clean Air Coalition (CCAC), a government-sponsored global effort to reduce short-lived “climate pollutants” (initially focused on methane, black carbon, and hydrofluorocarbons).

Proposed amendments to the OICA text proposed in order to adapt certain requirements to the current state of technology and to transpose the latest decisions of the EU regarding OBD threshold limits.

Proposal to add text omitted during the preparation of working document GRPE/2014/12 (proposal to update requirements in line with the current state of technology and to transpose the latest decisions of the EU regarding OBD threshold limits).

Explanation and rationale for the proposal to update OBD threshold limits and align UN R49 with the latest EU OBD requirements.

The scope of EU Euro VI standards for heavy-duty vehicles has been expanded compared with Euro V. In order to prevent inconsistencies that could affect the ability to offer all vehicles for export, this proposal would apply the expanded scope retrospectively to the 05 series of amendments to UN R49. This proposal was adopted by the Working Party on Pollution and Energy (GRPE) at its 68th session based on document GRPE/2014/6, not amended.

Text prepared by the International Organization of Motor Vehicle Manufacturers (OICA) in order to adapt some requirements to the current state of technology and to transpose the latest decisions of the EU regarding OBD threshold limits.

Status report on the group’s current activities, including work on a new regulation covering heavy-duty dual-fuel retrofit systems.

As the Euro VI standards for heavy duty vehicles become mandatory throughout the European Union, manufacturers may adapt their certification processes to take account of the extended scope of Euro VI compared to Euro V. In order to prevent inconsistencies that could affect the ability to offer all vehicles for export, it is proposed to carry back this scope amendment retrospectively to the 05 series of amendments.

Since Euro VI will be fully implemented in the EU from 31 December 2013, this amendment has no effect on EU Approvals or equivalences.

Proposal to correct provisions concerning permissions to disable OBD system monitors during testing under certain altitude and temperature conditions contained in the proposal to revise the 06 series of amendments to UN R49.

GRPE-approved text, based on a proposal prepared by the Euro VI Expert Working Group of the European Commission to revise the 06 series of amendments to UN R49 in order to address situations that were not covered by the latest series of amendments and to clarify the text.

Proposal as approved by the GRPE to introduce type-approval provisions for vehicles equipped with LNG propulsion systems and to extend the pollutant emission requirements of the regulation to dual-fuel heavy duty engines and vehicles.

UNECE report in response to World Health Organization concerns over vehicle emissions, in particular diesel particulates.

Revised proposal to introduce an amendment to documents GRPE/2013/8 and GRPE-66-10 that would permit the manufacturer to request a temporary disablement of OBD monitors at low ambient temperature in the same manner as permitted at high ambient temperatures (above 35°C).

Document GRPE/2013/7 was prepared to modify the 05 series of amendments of UN R49 (Euro V) in order to extend the pollutant emission requirements to dual-fuel heavy duty engines and vehicles. Per agreement with GRPE, this document proposes amendments to the 05 series based on the latest GFV work.

Proposal to introduce an amendment to documents GRPE/2013/8 and GRPE-66-10 that would permit the manufacturer to request a temporary disablement of OBD monitors at low ambient temperature in the same manner as permitted at high ambient temperatures (above 35°C).

UNECE “background note” providing information on developments in air pollution, the results of recent studies on the harmful effects of diesel exhausts, policy developments in the reduction of pollutant emissions to address health and environmental concerns.