UN R83 Supplement 4 (08 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 4 to the 08 series of amendments

Supplement 3 → 4

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

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What changed: For vehicles of categories X and Y, the mass in Annex 1, paragraph 2.6. must not include the mass of the driver.
Table A3/1 now names the series of amendments or the version of UN Regulations Nos. 24, 85 and 168, and adds “or any later version”.
In Annex 4, checks for malfunction, low fuel level and low reagent level now refer to indications or warnings, not to lamps or lights.
Why: The Task Force on Automated Vehicles Regulations Screening (AVRS) says that its changes are necessary to include vehicles with Automated Driving Systems in the Regulation.
Vehicles of categories X and Y do not have a driver position, so the driver mass is not part of the mass in running order.
The proposal changes references to driver actions, and driver messages and warnings, to suit vehicles with and without a driver.

Q1What changed15 changes

Driver mass for vehicle categories X and Y (Annex 1, para. 2.6.)

For vehicles of categories X and Y, the mass in paragraph 2.6. must not include the mass of the driver. Before this supplement, paragraph 2.6. had no such exception for the driver. The other items of the mass, for example liquids and tools, do not change.

Mass of the vehicle with bodywork and, in the case of a towing vehicle of category other than M1, with coupling device, if fitted by the manufacturer, in running order, or mass of the chassis or chassis with cab, without bodywork and/or coupling device if the manufacturer does not fit the bodywork and/or coupling device (including liquids, tools, spare wheel, if fitted, and driver , and, for buses and coaches, a crew member if there is a crew seat in the vehicle) (maximum and minimum for each variant):). For vehicles of categories X and Y the mass of the driver shall not be included: ........

Operating mode switch items deleted (Annex 1, para. 3.4.3.; Annex 2, para. 1.9.2.)

This supplement deletes the item “Operating mode switch: with/without” from Annex 1 (paragraph 3.4.3.) and from Annex 2 (paragraph 1.9.2.). Annex 1 paragraphs 3.4.3.1., 3.4.3.1.1., 3.4.3.1.2. and 3.4.3.1.3. become paragraphs 3.4.3., 3.4.3.1., 3.4.3.2. and 3.4.3.3. Their text does not change.

Operating mode switch: with/without

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Series of amendments of other UN Regulations in Table A3/1 (Annex 3)

Table A3/1 now names the 03 series of amendments to UN Regulation No. 24 and the original version of UN Regulations Nos. 85 and 168. The entries for UN Regulations Nos. 24, 85, 154 and 168 now add “or any later version”. The UN Regulation No. 154 entries now say “Level 1A requirements of the 02 series of amendments or the requirements of the 03 series of amendments”. A new key entry (4) says that the requirements of Level 1A or Level 2 apply for UN Regulations Nos. 154 and 168. The UN Regulation No. 154 entries and the UN Regulation No. 168 entry refer to key entry (4).

The requirements stated in Part III of UN Regulation No. 24 (if applicable) The requirements of UN Regulation No. 85 The requirements of UN Regulation No. 168 on RDE Level 1A requirements of the 02 series of amendments or the requirements of the 03 series of amendments taking into account the utility factor based on dnea determined in accordance with the values specified in Table A8.App5/1 of Appendix 5 to Annex B8 to UN Regulation No. 154, or any later version(4) The requirements stated in Part III of the 03 Series of Amendments to UN Regulation No. 24 (if applicable), or any later version The requirements of the Original Version to UN Regulation No. 85, or any later version The requirements of the Original Version to UN Regulation No. 168 on RDE, or any later version(4) Level 1A requirements of the 02 series of amendments or the requirements of the 03 series of amendments taking into account the utility factor based on dneb determined in accordance with the values specified in Table A8.App5/1 of Appendix 5 to Annex B8 to UN Regulation No. 154, or any later version(4) Level 1A requirements of the 02 series of amendments or the requirements of the 03 series of amendments taking into account the utility factor based on dnec determined in accordance with the values specified in Table A8.App5/1 of Appendix 5 to Annex B8 to UN Regulation No. 154(4154, or any later version(4)

(4): For UN Regulations No. 154 and 168 the requirements of Level 1A or Level 2 shall apply.

Vehicle examination for in-service conformity testing (Annex 4, para. 5.7.2. and Appendix 1)

Paragraph 5.7.2. of Annex 4 now asks for a “check for indication of malfunction” instead of “visual checks for lit malfunction indicator lamps”. In Appendix 1 to Annex 4, paragraph 1. now asks about an active indication of low fuel level, not the fuel reserve light. Paragraph 2. of Appendix 1 now asks about warnings, not warning lights on the instrument panel, for a malfunction that normal maintenance cannot resolve. Paragraph 3. of Appendix 1 now asks about an active indication of low reagent level after engine-on, not the SCR light. In paragraphs 1. to 3., the instruction that follows each question does not change.

The following checks shall be carried out: OBD checks (performed before or after the test), visual checks check 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 in 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? Has 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 do you use your vehicle 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. Check and document (with photos) If there is damage or leaks, the vehicle is declared faulty. | F | | 5 | Exhaust gas relevant components 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 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 | | | | Remarks for: Repair / replacement of components / part numbers | | |

User-selectable modes (Annex 4, Appendix 5, paras. 18. and 19.)

Paragraphs 18. and 19. of Appendix 5 to Annex 4 now say “User-selectable mode(s)” instead of “Driver selectable mode(s)”.

Driver selectable User-selectable mode(s) used during the TA tests (pure ICE) or for charge sustaining test (NOVC-HEV, OVC-HEV, NOVC-FCHV)). Driver selectable User-selectable mode(s) used during the TA tests for charge depleting test (OVC-HEV)).

Gear position in the Type 2 test (Annex 5, paras. 2.3. and 2.4.)

For manually-operated or semi-automatic-shift gearboxes, paragraph 2.3. now refers to the gear in “neutral”, not to the gear lever in the “neutral” position. For automatic-shift gearboxes, paragraph 2.4. now refers to the gear in “neutral” or “park”, not the gear selector in “neutral” or “parking”. Paragraph 2.3. keeps the condition that the clutch is engaged.

In the case of vehicles with manually-operated or semi-automatic-shift gearboxes, the test shall be carried out with the gear lever in the "neutral" position and with the clutch engaged.

In the case of vehicles with automatic-shift gearboxes, the test shall be carried out with the gear selector in either the "neutral" or the "parking" position.park".

Reference to R.E.3 in footnote 1

Footnote 1 now refers to the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.8. Before this supplement, the footnote referred to document ECE/TRANS/WP.29/78/Rev.6. The footnote no longer refers to “para. 2.”, and its web address is now “https://unece.org/transport/vehicle-regulations/wp29/resolutions”. The removal of “para. 2.” and the new web address come from Annex VI of ECE/TRANS/WP.29/1192.

As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.6, para. 2. - www.unece.org/transport/vehicle-regulations/wp29/resolutionsECE/TRANS/WP.29/78/Rev.8 - https://unece.org/transport/vehicle-regulations/wp29/resolutions

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Q2Why it changed

Proposed by: Task Force on Automated Vehicles Regulations Screening (AVRS); for Annex 1, paragraph 3.4.3., Annex 2, paragraph 1.9.2. and Table A3/1, experts from OICA
Working party: GRPE, 93rd session (October 2025) and 94th session (March 2026)

Reasons

The proposal says that its changes are necessary to include vehicles with Automated Driving Systems in the Regulation.
Source
“The document introduces changes required to incorporate vehicles with Automated Driving Systems into the existing Regulation.”
ECE/TRANS/WP.29/GRPE/2025/23II. Justification, para. 1
Vehicle categories X and Y are sub-categories in R.E.3 and do not have a driver position. For this reason, the driver mass is not part of the mass in running order.
Sources (2)
“Vehicle categories X and Y are sub-categories which are introduced in R.E.3”
ECE/TRANS/WP.29/GRPE/2025/23II. Justification, para. 2
“do not have a driver position. The driver mass is therefore not part of the mass in running order.”
ECE/TRANS/WP.29/GRPE/2025/23II. Justification, para. 2
The proposal takes out references to driver actions, so that vehicles with and without a driver are in the scope of the Regulation. It also changes driver messages and warnings so that they suit vehicles with and without a driver.
Sources (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/2025/23II. 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/2025/23II. Justification, para. 4
The concept of “Operating Mode Switch” has been removed from UN Regulation No. 83, but that removal left out these two paragraphs. They give no useful information, so they should be deleted from the information document (Annex 1) and the addendum to the approval certificate (Annex 2).
Sources (2)
“The concept of “Operating Mode Switch” has been removed from Regulation No.83 and these two paragraphs were omitted from this removal.”
ECE/TRANS/WP.29/GRPE/93Annex IV, II. Justification, para. 6
“As they offer no useful information they should be deleted from both the manufacturer’s information document (Annex 1) and the addendum to the approval certificate (Annex 2).”
ECE/TRANS/WP.29/GRPE/93Annex IV, II. Justification, para. 6
Proposer's reason (informal document GRPE-94-18-Rev.1)
When the 08 series of amendments was made, it gave no specific series of amendments for UN Regulations Nos. 24, 85 and 168. At that time this was not necessary, because no new series of amendments to these Regulations was foreseen. The proposal aims to make clear the minimum requirements for Euro 6e, Euro 6e-bis and Euro 6e-bis-FCM type-approval by naming the series of amendments.
Submitted by Experts from OICA. Working party adoption: ECE/TRANS/WP.29/GRPE/94, para. 16.
Sources (3)
“When creating the 08 Series of Amendments to UN Regulation No. 83 no indications of specific Series of Amendments were given for UN Regulation No. 24, 85 and 168.”
GRPE-94-18-Rev.1II. Justification, para. 1
“This was at the time not necessary, as no new Series of Amendments for these Regulations were foreseen.”
GRPE-94-18-Rev.1II. Justification, para. 1
“This proposal aims to give clarity on the minimum requirements for type-approval in accordance with Euro 6e, Euro 6e-bis and Euro 6e-bis-FCM of UN Regulation No. 83 by specifying the relevant Series of Amendments.”
GRPE-94-18-Rev.1II. Justification, para. 2

Document trail

2025-08ProposalECE/TRANS/WP.29/GRPE/2025/23Proposal by the Task Force on AVRS
—RevisedGRPE-93-12Updates to working document GRPE/2025/23
—Amended in sessionGRPE-93-14OICA amendments that remove two paragraphs
—Working party adoptsECE/TRANS/WP.29/GRPE/93GRPE session report, para. 16 and Annex IV
—Amended in sessionGRPE-94-18-Rev.1OICA proposal to amend Table A3/1
—Working party adoptsECE/TRANS/WP.29/GRPE/94GRPE session report, para. 16
2026-04Sent to WP.29ECE/TRANS/WP.29/2026/147Text that GRPE sent to WP.29 and AC.1
—Amended in sessionWP.29-199-10Amendment to footnote 1, 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

For vehicles of categories X and Y, do not include the driver mass in Annex 1, paragraph 2.6.
Delete the item “Operating mode switch: with/without” (paragraph 3.4.3.) from your information document.
Check your approvals against the series of amendments or versions that Table A3/1 now names.
Meet the Level 1A or Level 2 requirements of UN Regulations Nos. 154 and 168 (Table A3/1, key (4)).
Be ready for in-service conformity checks of active indications for malfunction, low fuel level and low reagent level.

Component supplier

No direct action for this role.

Technical service / Approval authority

For categories X and Y, make sure that the mass in Annex 1, paragraph 2.6. excludes the driver.
Delete the item “Operating mode switch: with/without” (paragraph 1.9.2.) from the addendum to the approval certificate.
Check compliance with UN Regulations Nos. 154 and 168 against Level 1A or Level 2 (Table A3/1, key (4)).
When you examine vehicles for in-service conformity testing, check for the indications and warnings that the new wording names.
If your Type 2 test instructions say “gear lever” or “gear selector”, use the Annex 5 wording.

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