UN R83 Supplement 1 (09 series) · UNECE Regulation No. 83 (ECE R83) — Uniform provisions concerning the approval of vehicles with regard to the emission of pollutants according to engine fuel requirements.

UN R83 — Supplement 1 to the 09 series of amendments

Base text → Supplement 1

Adopted at the WP.29 199th sessionEntry into force not yet known

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What changed: New paragraph 9.7. and new Annex 14 add in-service conformity checks of system power, and these checks are optional.
The text of Annex 7 on manipulation devices and manipulation strategies is deleted, and the annex now reads “Reserved”.
Vehicles of categories X and Y must be tested in the ADS testing mode in the tests of Annexes 6 and 8.
Why: The requirements on manipulation devices and manipulation strategies are proposed for UN Regulation No. 154, so they should be removed from UN Regulation No. 83.
EU Regulation 2024/1257 (EU7) introduces optional in-service conformity tests for power determination.
The changes incorporate vehicles with Automated Driving Systems and allow vehicles with and without a driver in the scope.

Q1What changed213 changes

Removal of the rules on manipulation devices and manipulation strategies (Annex 7, paras. 1., 3.1.2., 3.3.2. and 5.1.1.)

The text of Annex 7 “Manipulation devices and manipulation strategies” is deleted, and the annex now reads “Reserved”. Its Appendix 1 on the assessment and approval of AES and BES and its Appendix 2 on documentation packages are deleted. Paragraph 3.1.2.(a), on documentation to justify the absence of manipulation devices and manipulation strategies, is now “Reserved”. Paragraph 3.3.2., which referred to the tests, methods and procedures of Annex 7, is now “Reserved”, and paragraph 3.3.2.1. is deleted. The scope in paragraph 1. and paragraph 5.1.1. no longer name manipulation devices and manipulation strategies.

Manipulation devices and manipulation strategiesReserved

For the purpose of paragraph 3.1.2.(a)., the manufacturer shall comply with Annex 7 to this Regulation on tests, methods and procedures to establish the absence of manipulation devices and manipulation strategies.

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In-service conformity checks of system power (paras. 9.1., 9.7. and 9.7.1., new Annex 14)

New paragraph 9.7. and new Annex 14 add in-service conformity checks of system power approved in accordance with UN Regulation No. 177. These checks are optional, and paragraph 9.1. now lists Annex 14 for system power testing “when conducted at the option of the Type Approval Authority”. Paragraph 9.7.1. applies to properly maintained and used vehicles. Their total distance must be 3,000 km to 40,000 km, or their age up to 2 years from manufacture, whichever comes first. Annex 14 sets out the types of tests, the vehicle examination and maintenance, a statistical procedure and a vehicle survey in Appendix 1. An ISC test passes when the measured system power is greater than 90 per cent of the manufacturer's declared value.

In-service conformity checks of System Power

The requirement to undertake in-service conformity checks of System Power is optional

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Optional in-service conformity checks of electric range at low temperatures (para. 9.4., Table A, Annex 11)

Paragraph 9.4. and Annex 11 now state that low-temperature in-service conformity checks of the electric range of pure electric vehicles are optional. In Table A of paragraph 5.2., the in-service conformity row now has “Yes3”. New footnote 3 says that in-service conformity checks of the electric range of pure electric vehicles at low temperatures are optional. In Annex 11, paragraph 1.3. now says that the low temperature vehicle family is as defined in paragraph 6.10. of UN Regulation No. 154.

The requirement to undertake in-service conformity checks of electric range of pure electric vehicles at low temperatures is optional.

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Tests of vehicles of categories X and Y and of vehicles with an ADS testing mode (Annexes 1, 4, 6 and 8)

Under new paragraph 3.4.1. of Annex 6 and 3.6.1. of Annex 8, category X and Y vehicles must be tested in the ADS testing mode. This ADS testing mode is set out in paragraph 2.4.2.7. of Annex B6 to UN Regulation No. 154, extended where necessary for correct tests. If a vehicle has an ADS testing mode, it must be engaged for all chassis dynamometer tests where an ADS feature is active. In Annex 1, paragraph 2.6. now says that the mass of the driver is not included for vehicles of categories X and Y. Table A4/2 in Annex 4 has a new item 7, “Procedure to engage ADS Testing Mode”, for when an ADS testing mode is provided. Footnote 1 on R.E.3 now cites document ECE/TRANS/WP.29/78/Rev.8 instead of Rev.6, with no paragraph number and a changed web link.

Vehicles of categories X and Y shall be tested using the ADS testing mode as set out in paragraph 2.4.2.7. of Annex B6 to UN Regulation No. 154, but extended to enable the correct execution of the tests, where necessary.

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Indication and user mode words (Annex 4, Annex 9 para. 3.3.3.2., Annex 13 para. 2.2.(b))

In Annex 4, paragraph 5.7.2. now asks for “checks for indication of malfunction” instead of “visual checks for lit malfunction indicator lamps”. In Appendix 1 to Annex 4, lines 1 to 3 now ask about active indications and warnings instead of lights such as the “fuel reserve light”. In Appendix 5 to Annex 4, lines 18 and 19 now say “User-selectable mode(s)” instead of “Driver selectable mode(s)”. In Annex 9, paragraph 3.3.3.2., and Annex 13, paragraph 2.2.(b), “malfunction indicator” is now “malfunction indication”. AC.1 adopted the text as amended by Annex VI of the WP.29 session report, which made these Annex 9 and Annex 13 changes.

The following checks shall be carried out: OBD checks (performed before or after the test), visual checks for lit indication of malfunction indicator lamps, checks on air filter, all drive belts, all fluid levels, radiator and fuel filler cap, all vacuum and fuel system hoses and electrical wiring related to the after-treatment system for integrity; checks on ignition, fuel metering and pollution control device components for maladjustments and/or tampering.

Selection of Vehicles for In-Service Conformity Emissions Testing | | | | | | | | Confidential Date: | | | | x Name of investigator: | | | | x Location of test: | | | | x Country of registration: | | | x | | | x = Exclusion Criteria | X = Checked and reported | Vehicle Characteristics | | | | Registration plate number: | | | x | x Mileage and age of vehicle: The vehicle must comply with the rules with regards to mileage and age in paragraph 9. of this Regulation, otherwise it cannot be selected. The age of the vehicle counts from the date of first registration | | x | | Date of first registration: | | | x | VIN: | | | x | x Emission class and character: | | | x | Country of registration: The vehicle must be registered in the Contracting Party | | x | x | Model: | | | x | Engine code: | | | x | Engine volume (l): | | | x | Engine power (kW): | | | x | Gearbox type (auto/manual): | | | x | Drive axle (FWD/AWD/RWD): | | | x | Tyre size (front and rear if different): | | | x | Is the vehicle involved in a recall or service campaign? If yes: Which one? Have the campaign repairs already been done? The repairs must have been done before the start of the ISC testing | | x | x | Vehicle Owner Interview (the owner will only be asked the main questions and shall have no knowledge of the implications of the replies) | | | | Name of the owner (only available to the accredited inspection body or laboratory/Technical service) | | | | x Contact (address / telephone) (only available to the accredited inspection body or laboratory/Technical service) | | | | x How many owners did the vehicle have? | | | x | Did the odometer not work? If yes, the vehicle cannot be selected. | | x | | Was the vehicle used for one of the following? | | | | As car used in show-rooms? | | | x | As a taxi? | | | x | As delivery vehicle? | | | x | For racing / motor sports? | | x | | As a rental car? | | | x | Has the vehicle carried heavy loads over the specifications of the manufacturer? If yes, the vehicle cannot be selected. | | x | | Have there been major engine or vehicle repairs? | | | x | Have there been unauthorised major engine or vehicle repairs? If yes, the vehicle cannot be selected. | | x | | Has there been an unauthorised power increase/tuning? If yes, the vehicle cannot be selected. | | x | | Was any part of the emissions after-treatment and/or the fuel system replaced? Were original parts used? If original parts were not used, the vehicle cannot be selected. | | x | x | Was any part of the emissions after-treatment system permanently removed? If yes, the vehicle cannot be selected | | x | | Were there any unauthorised devices installed (Urea killer, emulator, etc)? If yes, the vehicle cannot be selected | | x | | Was the vehicle involved in a serious accident? Provide a list of damage and repairs done afterwards | | | x | Has the car been used with a wrong fuel type (i.e. gasoline instead of diesel) in the past? Has the car been used with non-commercially available fuel (black market, or blended fuel?) If yes, the vehicle cannot be selected. | | x | | Did you use air-fresher, cockpit-spray, brake cleaner or other high hydrocarbon emission source around the vehicle during the last month? If yes, the vehicle cannot be selected for evaporative testing. | | x | | Was there a gasoline spill in the inside or outside of the vehicle during the last 3 months? If yes, the vehicle cannot be selected for evaporative testing. | | x | | Did anyone smoke in the car during the last 12 months? If yes, the vehicle cannot be selected for evaporative testing | | x | | Did you apply corrosion protection, stickers, under seal protection, on any other potential sources of volatile compounds to the car? If yes, the vehicle cannot be selected for evaporative testing | | x | | Was the car repainted? If yes, the vehicle cannot be selected for evaporative testing | | x | | Where has your vehicle been used more often? | | | | % motorway | | | x | % rural | | | x | % urban | | | x | Did you drive the vehicle in a non-Contracting Party for more than 10 % of driving time? If yes, the vehicle cannot be selected | | x | — | In which country was the vehicle refuelled during the last two times? If the vehicle was refuelled the last two times outside a state applying the compliant Fuel Standards, the vehicle cannot be selected. | | x | | Has a fuel additive, not approved by the manufacturer been used? If yes then the vehicle cannot be selected. | | x | | Has the vehicle been maintained and used in accordance with the manufacturer's instructions? If not, the vehicle cannot be selected. | | x | | Full service and repair history including any re-works If the full documentation cannot be provided, the vehicle cannot be selected. | | x | | | Vehicle Examination and Maintenance | X = Exclusion Criteria/ F = Faulty Vehicle | | X = checked and reported 1 | Fuel tank level (full / empty) Is the there an indication active of low fuel reserve light ONlevel? If yes, refuel before test. | | | x 2 | Are there any warning lights on the instrument panel warnings activated indicating a vehicle or exhaust after-treatment system malfunctioning that cannot be resolve resolved by normal maintenance? (Malfunction Indication Light, Engine Service Lightmalfunction indication, engine service indication, etc?) If yes, the vehicle cannot be selected | x | | 3 | Is the SCR light on there an indication active of low reagent level after engine-on? If yes, the AdBlue should be filled in, or the repair executed before the vehicle is used for testing. | x | | 4 | Visual examination exhaust system Check leaks between exhaust manifold and end of tailpipe. In case of noticeable problems or a fail, check and document (with photos) If there is damage or leaks, the vehicle is declared faulty. | F | | 5 | Exhaust gas relevant components In case of noticeable problems or a fail, check and document (with photos) all emissions relevant components for damage. If there is damage, the vehicle is declared faulty. | F | | 6 | Evaporative system Pressurize fuel-system (from canister side), testing for leaks in a constant ambient temperature environment, FID sniff test around and in the vehicle. If the FID sniff test is not passed, the vehicle is declared faulty. | F | | 7 | Fuel sample In case of a fail, collect fuel sample from the fuel tank. | | | x 8 | Air filter and oil filter Check for contamination and damage and change if damaged or heavily contaminated or less than 800 km before the next recommended change. | | | x 9 | Window washer fluid (only for evaporative testing) Remove window washer fluid and fill tank with hot water. | | | x 10 | Wheels (front & rear) Check whether the wheels are freely moveable or blocked by the brake. If not, the vehicle cannot be selected. | x | | 11 | Tyres (only for evaporative testing) Remove spare tyre, change to stabilised tyres if the tyres were changes less than 15,000 km ago. Use summer and all season tyres only. | | | x 12 | Drive belts & cooler cover In case of damage, the vehicle is declared faulty. Document with photos | F | | 13 | Check fluid levels Check the max. and min. levels (engine oil, cooling liquid) / top up if below minimum | | | x 14 | Filler flap (only for evaporative testing) Check overfill line within filler flap is completely free of residues or flush the hose with hot water. | | | x 15 | Vacuum hoses and electrical wiring Check all for integrity. In case of damage, the vehicle is declared faulty. Document with photos | F | | 16 | Injection valves / cabling Check all cables and fuel lines. In case of damage, the vehicle is declared faulty. Document with photos | F | | 17 | Ignition cable (gasoline) Check spark plugs, cables, etc. In case of damage, replace them. | | | x 18 | EGR & Catalyst, Particle Filter Check all cables, wires and sensors. In case of tampering, the vehicle cannot be selected. In case of damage the vehicle is declared Faulty, Document with photos | x/F | | 19 | Safety condition Check tyres, vehicle's body, electrical and braking system status are in safe conditions for the test and respect road traffic rules. If not, the vehicle cannot be selected. | x | | 20 | Semi-trailer Are there electric cables for semi-trailer connection, where required? | | | x 21 | Aerodynamic modifications Verify no aftermarket aerodynamics modification that cannot be removed before testing was made (roof boxes, load racking, spoilers, etc.) and no standard aerodynamics components are missing (front deflectors, diffusers, splitters, etc.). If yes, the vehicle cannot be selected. Document with photos. | x | | 22 | Check if less than 800 km away from next scheduled service, if yes, then perform the service. | | | x 23 | All checks requiring OBD connections to be performed before and/or after the end of testing | | | 24 | Powertrain Control Module calibration part number and checksum | | | x 25 | OBD diagnosis (before or after the emissions test) Read Diagnostic Trouble Codes & Print error log | | | x 26 | OBD Service Mode 09 Query (before or after the emissions test) Read Service Mode 09. Record the information. | | | x 27 | OBD mode 7 (before or after the emissions test) Read Service Mode 07. Record the information | | | x | Remarks for: Repair / replacement of components / part numbers | | |

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Emission character and sub-character tables (Annex 3, para. 12.2.3.(a))

In Table A3/1, the brake emissions column now gives sub-characters RA to RE from new Table A3/4, not compliance texts. New Table A3/4 gives sub-characters RA to RE for compliance with UN Regulation No. [179] on brake particle emissions. In Table A3/2, sub-characters MC and MD are deleted, and new sub-character MG is for “R154-04 – WITH OBFCM-2” and all powertrains. Paragraph 12.2.3.(a) now refers only to the character GL, not to “GL or GE”. New footnotes say that ‘N2’ in the vehicle category columns applies only to Euro 7ext vehicles as defined in Article 5(2) of Regulation (EU) 2024/1257. In Annex 3, the approval mark items (e) and (f) change places: (e) is now UN Regulation No. [179] and (f) No. [180].

Vehicle category or product type Brake emissions MA or MC M1, N1 Compliance to the requirements of the UN Regulation No. [179] in its original version MB or MD N2 (Euro 7ext3) MA or ME or for FCHV only MC OA M1, N1 Compliance to the requirements of the 01 series of amendments of UN Regulation No. [179] GE Euro 7B MB or MF or for FCHV only MD OB N2 (Euro 7ext3) M1, N1 SVM N2 (Euro 7ext3) SVM Emission Character1,2Emission Character (1) (2) Sub-character for this regulation (see Table A3/2) (see Table A3/2) Sub-character for OBM and EVP (see Table A3/3)Sub-character for OBM and EVP (see Table A3/3) Vehicle category Sub-character for brake emissions (see Table A3/4) MA, ME or MG M1, N1 RA MB, MF or MG N2 (Euro 7ext3) RB MG OA or OB M1, N1, N2 (Euro 7ext3) RC M1 (SVM), N1 (SVM) RD N2 (Euro 7ext3, SVM) RE

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Deleted information items and changed references (Annexes 1, 2 and 5, paras. 2.47. and 2.48.)

Annex 1 no longer has items 3.2.1.6., 3.2.1.6.1. and 3.2.1.7. on idle engine speeds and carbon monoxide content at idle. Item 3.2.13. on the location of the absorption coefficient symbol is also deleted. Item 3.4.3. of Annex 1 and item 1.9.2. of Annex 2, “Operating mode switch: with/without”, are deleted. Paragraphs 2.47. and 2.48. now refer to Appendix 2, not Appendix 3, to Annex C1 of Regulation No. 154.04. In Annex 5, Table 4, Step 1 now refers to Appendix 1 to Annex C1 for the initial virtual distance, instead of Appendix 2. In Step 1, the worst-case certified energy consumption is now as declared in paragraph 3.5.7.5.3. in Annex A1 of UN Regulation No. 154.

Normal engine idling speed:

High idle engine speed:

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Q2Why it changed

Proposed by: Task Force on Automated Vehicles Regulations Screening (AVRS) (ADS changes); experts of the United Kingdom, the European Commission and OICA (manipulation rules, low-temperature checks); experts from OICA (system power checks, operating mode switch); experts of the European Commission (Annex 3 tables)
Working party: GRPE, 94th session (March 2026)

Reasons

The proposal brings vehicles with Automated Driving Systems into the Regulation. The references to R.E.3 are updated to include vehicles equipped with an ADS in the scope. Revision 8 of R.E.3 introduces vehicle categories X and Y. These vehicles cannot be driven manually above 6 km/h. References to driver actions are taken out and written again, so that the Regulation allows vehicles with and without a driver. Driver messages and warnings are edited to suit vehicles with and without a driver.
Sources (4)
“The document introduces changes required to incorporate vehicles with Automated Driving Systems into the existing Regulation.”
ECE/TRANS/WP.29/GRPE/2026/7II. Justification, para. 1
“Vehicle categories X and Y are introduced in Revision 8 of R.E.3, prepared by the Task Force on Automated Vehicle Categorisation (TF-AVC) under GRSG and GRVA, and are not capable to be driven manually above 6 km/h.”
ECE/TRANS/WP.29/GRPE/2026/7II. Justification, para. 2
“All references to driver actions are taken out of the Regulation and written in a way that it allows for vehicles with and without a driver into the scope of the Regulation.”
ECE/TRANS/WP.29/GRPE/2026/7II. Justification, para. 3
“Driver messages and warnings are edited in way that it would be suitable for vehicles with and without a driver.”
ECE/TRANS/WP.29/GRPE/2026/7II. Justification, para. 4
The requirements for manipulation devices and manipulation strategies are now proposed for inclusion in Level 1A and Level 2 of UN Regulation No. 154. For this reason, they should be removed from UN Regulation No. 83.
Sources (2)
“The requirements for manipulation devices and manipulation strategies are now proposed for inclusion in Level 1A and Level 2 of UN Regulation No. 154.”
ECE/TRANS/WP.29/GRPE/2026/11II. Justification, para. 1
“Consequently they should be removed from UN Regulation No. 83.”
ECE/TRANS/WP.29/GRPE/2026/11II. Justification, para. 1
In Euro 7, in-service conformity checks of the electric range of pure electric vehicles at low temperatures are optional. The Regulation is updated to align with those requirements.
Sources (2)
“The requirement to undertake in-service conformity checks for electric range of pure electric vehicles at low temperatures is optional in Euro 7.”
ECE/TRANS/WP.29/GRPE/2026/11II. Justification, para. 2
“This Regulation has been updated to align with those requirements.”
ECE/TRANS/WP.29/GRPE/2026/11II. Justification, para. 2
EU Regulation 2024/1257 (EU7) introduces optional in-service conformity tests for power determination. New Annex 14 describes the vehicle selection criteria, test method, statistical approach and vehicle survey for reproducible tests.
Sources (2)
“EU Regulation 2024/1257 (EU7) introduces optional tests for ISC for power determination.”
ECE/TRANS/WP.29/GRPE/2026/12II. Justification
“This new Annex provides a description of vehicle selection criteria, test methodology, statistical approach and vehicle survey to fulfill the requirements of reproducible ISC tests.”
ECE/TRANS/WP.29/GRPE/2026/12II. Justification
Proposer's reason (informal document GRPE-94-65)
The updates remove some parameters that are now redundant from the Annex 1 information document and the Annex 2 communication.
Submitted by Experts from the EC, UK and OICA. Working party adoption: ECE/TRANS/WP.29/GRPE/94, para. 18.
Source
“Updates have been made to remove some now redundant parameters from the Annex 1 Information Document and Annex 2 Communication.”
GRPE-94-65II. Justification, para. 4

Document trail

2026-01ProposalECE/TRANS/WP.29/GRPE/2026/7AVRS proposal to allow type approval of vehicles with Automated Driving Systems
2026-01ProposalECE/TRANS/WP.29/GRPE/2026/11Proposal by the United Kingdom, the European Commission and OICA to remove the manipulation rules
2026-01ProposalECE/TRANS/WP.29/GRPE/2026/12OICA proposal on in-service conformity requirements for system power
—Amended in sessionGRPE-94-24-Rev.1European Commission changes to paragraph 12.2.3.(a) and the Annex 3 tables
—Amended in sessionGRPE-94-30AVRS proposal for a new supplement, introduced at the session
—Amended in sessionGRPE-94-51OICA proposal to delete the two operating mode switch items
—RevisedGRPE-94-65Single consolidated text by experts from the EC, UK and OICA
—Working party adoptsECE/TRANS/WP.29/GRPE/94GRPE session report, paras. 17 and 18
2026-04Sent to WP.29ECE/TRANS/WP.29/2026/148Text that GRPE sent to WP.29 and AC.1
—Amended in sessionWP.29-199-10Editorial amendments for the AC.1 vote, reproduced in Annex VI of ECE/TRANS/WP.29/1192
2026-06-24WP.29 adoptsECE/TRANS/WP.29/1192Adopted at the 199th session (session report, para. 103)
PendingIn forceDate not yet known

Q3Who is affected

Vehicle manufacturer

Update your type-approval documents that refer to Annex 7 or to paragraph 3.1.2.(a) or 3.3.2.; these are now “Reserved”.
Delete items 3.2.1.6., 3.2.1.6.1., 3.2.1.7., 3.2.13. and 3.4.3. from your Annex 1 forms.
Prepare the data in Annex 14, paragraph 2.1., that the Type Approval Authority can request for ISC testing.
Plan for the Annex 14 pass rule: measured system power greater than 90 per cent of your declared value.
For category X and Y vehicles, give the Annex 1 item 2.6. mass without the driver mass.
If there is an ADS testing mode, add item 7 of Table A4/2 to the Testing Transparency package.
Be ready for Annex 6 and Annex 8 tests of category X and Y vehicles in the ADS testing mode.

Component supplier

Give the vehicle manufacturer the REESS current and voltage measurement procedure, access points and device list for Annex 14.
Give the vehicle manufacturer the parameters to calculate the peak and sustained power for Annex 14 tests.
Make sure the ADS testing mode can be extended for Annex 6 and 8 tests of categories X and Y.

Technical service / Approval authority

When the Type Approval Authority chooses in-service conformity checks of system power, follow paragraph 9.7.1. and Annex 14.
For system power in-service conformity checks, check vehicles other than NOVC-HEVs for battery SOCE of at least 90 per cent.
For system power in-service conformity checks, check any NOVC-HEV battery state of health value for at least 90 per cent.
Count a test as passed when measured system power is greater than 90 per cent of the manufacturer's declared value.
If fitted, engage the ADS testing mode in Annex 6 and 8 chassis dynamometer tests with an active ADS feature.
Update your in-service conformity plans: Annex 11 checks of pure electric vehicle range at low temperatures are optional.
Check emission characters in approval marks against the changed Tables A3/1 to A3/3 and new Table A3/4.
From your Annex 2 communication forms, delete item 1.9.2. on the operating mode switch.

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ⓘ This report gives advice only. It is not legal or type-approval advice.