Euro 7 Buses and Coaches: Rules, Limits and Key Dates

Regulation (EU) 2024/1257 was published in the Official Journal of the European Union on 8 May 2024 and entered into force on 28 May 2024. For buses and coaches, though, the practical application follows a specific timeline that bears no relation to that entry-into-force date. Conflating the two is the most common mistake made when reading this legislation: there are three distinct dates, each generating different obligations, applied in sequence.

This article sets out what the regulation requires for M2 and M3 category vehicles, minibuses, urban buses, interurban buses and touring coaches, and when each obligation actually kicks in.

Three dates every operator must know: entry into force, type approval and registration

EU Regulation 2024/1257 draws a clear distinction between three key moments for heavy passenger vehicles.

28 May 2024: entry into force. The regulation became legally binding from 8 May 2024, the date of publication in the Official Journal, plus the twenty days specified in Article 21. From this date, Article 11(3) already applies, governing the granting of extensions to type approvals for replacement emission control systems already in force.

29 May 2028: first obligation for manufacturers. From this date, under Article 10(6), type approval authorities may no longer grant EU or national type approvals for new vehicle types in categories M2, M3, N2 and N3 that do not comply with the regulation. In practical terms: from 29 May 2028, it will no longer be possible to type-approve a new bus or coach with an internal combustion engine under the previous Euro 6 standards. Manufacturers intending to continue selling into the European market must have Euro 7-approved types ready by that date.

29 May 2029: ban on registration and sale. Article 10(7) provides that from this date national authorities shall consider certificates of conformity for new M2 and M3 vehicles that do not comply with the regulation as no longer valid, and shall prohibit the registration, sale and entry into service of such vehicles. For a fleet operator planning new vehicle purchases, 29 May 2029 is the date that actually matters: from that day, a new bus or coach, meaning one that has never been registered, cannot be registered in any Member State without Euro 7 type approval. The ban does not cover used vehicles that are already registered.

A temporary derogation exists under Article 10(8): until 31 December 2029, Member States may still allow the registration of M2 and M3 vehicles that, while not compliant with the new regulation, hold a valid type approval under Regulation (EC) No 595/2009, provided that category of vehicle has a 100% zero-emission target from the 2030 reporting period under Regulation (EU) 2019/1242. This is a very specific window, not applicable to combustion buses in general.

1 July 2031: small-volume manufacturers. Article 10(10) sets a further deadline for manufacturers producing fewer than 450 new combined M2 and M3 vehicles per year registered in the Union, as defined under the "small manufacturer" definition in Article 3(48). For these entities, the ban on registering non-compliant new vehicles takes effect from 1 July 2031.

What the regulation requires: Euro 7 emission limits for buses and coaches

Article 4(2) establishes that vehicles must comply with the emission limits set out in Annex I throughout their useful life, as defined in Annex IV. Vehicles type-approved to Euro 7 carry that designation.

Exhaust emission limits (Annex I, Table 2). For M2, M3, N2 and N3 vehicles equipped with an internal combustion engine, the regulation sets the following values, measured on WHSC and WHTC cycles (including positive-ignition, PI, engines):

• Nitrogen oxides (NOx): 200 mg/kWh in laboratory cycle; 260 mg/kWh in real driving emissions (RDE)

• Particulate matter by mass (PM): 8 mg/kWh in laboratory cycle; no separate RDE value set in the table

• Particle number (PN10): 6×10¹¹ #/kWh in laboratory cycle; 9×10¹¹ #/kWh in RDE

• Carbon monoxide (CO): 1,500 mg/kWh in laboratory cycle; 1,950 mg/kWh in RDE

• Non-methane organic gases (NMOG): 80 mg/kWh in laboratory cycle; 105 mg/kWh in RDE

• Ammonia (NH3): 60 mg/kWh in laboratory cycle; 85 mg/kWh in RDE

• Methane (CH4): 500 mg/kWh in laboratory cycle; 650 mg/kWh in RDE

• Nitrous oxide (N2O): 200 mg/kWh in laboratory cycle; 260 mg/kWh in RDE

Test conditions for M2, M3, N2 and N3 vehicles are defined in Annex III, Table 2: laboratory measurements apply Annex 4 to UN Regulation No 49; real driving emissions (RDE) apply Annex 8 of the same UN Regulation No 49, with the specific modifications set out in the regulation, including a conformity factor (CF) of 1.0 for all pollutants and the specified power thresholds.

Useful life and durability (Annex IV, Table 1). The obligation to comply with the limits extends across the full life of the vehicle. For buses and coaches the breakdown is as follows:

• M3 vehicles with a maximum mass above 7.5 t and N3 vehicles above 16 t: primary useful life up to 700,000 km or 12 years, whichever comes first; extended useful life up to 875,000 km or 15 years.

• M3 vehicles with a maximum mass up to 7.5 t, and N2 and N3 up to 16 t: primary useful life up to 300,000 km or 8 years; extended useful life up to 375,000 km or 10 years.

• M2 vehicles (grouped with M1 and N1 in Annex IV, Table 1): primary useful life up to 160,000 km or 8 years; extended useful life up to 200,000 km or 10 years.

During the extended useful life, gaseous emission limits may be adjusted using durability multipliers. For M2 the multiplier is 1.2 for gaseous pollutants, as indicated in Annex IV, Table 2. For N2, N3 and M3, those multipliers have not yet been set in the text of the regulation.

On-board technical requirements: monitoring, diagnostics and anti-tampering

The regulation goes well beyond tailpipe values. Article 4(6) requires that all M2 and M3 vehicles be equipped with:

• an OBD system (On-Board Diagnostics) capable of detecting malfunctions that cause emission exceedances;

• an OBM system (On-Board Monitoring) capable of monitoring exhaust emissions and detecting exceedances, communicating them wirelessly in anonymous form;

• an OBFCM device (On-Board Fuel and electric energy Consumption Monitoring) to record real-world fuel and energy consumption;

• an excessive emission warning system alerting the driver when emission limits are significantly exceeded;

• a low-reagent warning system for vehicles using consumable reagents such as AdBlue;

• devices for transmitting on-board data to external systems.

Article 6(6) specifies that OBM systems fitted to M2, M3, N2 and N3 vehicles must be capable of monitoring and recording NOx, NH3 and PM emissions and detecting exceedances of at least 2.5 times the limit values set in Annex I.

Article 7(4) introduces the Environmental Vehicle Passport (EVP), a digital document that the manufacturer must issue for each vehicle and deliver to the buyer, containing data on CO2 emissions, fuel consumption, electric range and engine power at the time of registration. EVP data must be accessible via the vehicle's electronic systems or a QR code.

Article 4(5) categorically prohibits manufacturers from designing vehicles with defeat devices or manipulation strategies. Article 12 reinforces the anti-tampering prohibition, extending it to economic operators and independent operators.

Who is covered and who benefits from special rules under Euro 7 for buses and coaches

The regulation applies to all M2 and M3 category vehicles sold, registered or put into service in the European Union, regardless of fuel type or energy source, as established by Article 6(4). This means electric buses fall within the scope in terms of battery durability, monitoring systems and non-exhaust emissions.

Small-volume manufacturers. For manufacturers producing fewer than 450 new combined M2+M3 vehicles per year registered in the Union, as defined in Article 3(48), Article 8 allows certain tests to be replaced by declarations of conformity for pollutant emissions. Likewise, production conformity with formal testing is not required. The deadline for these manufacturers is deferred to 1 July 2031, as set out in Article 10(10).

Responsibility between engine manufacturer and vehicle manufacturer. Article 9 addresses a situation that is common in the bus sector: the vehicle is assembled using an engine that has already been type-approved separately. In this case, type approval responsibility for the vehicle remains with the vehicle manufacturer, but the engine manufacturer may be made responsible for demonstrating compliance with in-service conformity requirements, by agreement between the parties.

Commission implementing acts. Article 14(9) requires the Commission to adopt, by 29 November 2026, the implementing acts defining the specific test procedures and methodologies for M2, M3, N2 and N3 vehicles and their engines. Without these acts, type approval authorities cannot grant new Euro 7 approvals. The type approval process for bus manufacturers is therefore also contingent on those acts being published on schedule.

Impact on fleet management and the used bus market

For an operator managing a bus or coach fleet, Regulation (EU) 2024/1257 has concrete effects across several dimensions.

The first concerns planning new vehicle purchases. From 29 May 2029, it will no longer be possible to register newly produced buses and coaches that do not meet Euro 7 requirements. Operators planning fleet renewals over a multi-year horizon need to factor in this deadline to avoid finding themselves unable to register vehicles already ordered or in delivery.

The second concerns managing existing vehicles. The regulation contains no retroactive obligations for vehicles already in service: Euro 6 buses currently in operation continue to run legally. The anti-tampering obligations under Article 12, however, apply to all operators and independent operators from the moment of entry into force.

The third concerns the used bus market. The regulation does not alter the operating conditions for used vehicles already registered. What changes is the composition of the active fleet over time: as new Euro 7 vehicles enter service, the used segment will gradually reflect that shift. Existing and future low-emission zones in individual Member States may impose additional restrictions independently of this regulation, based on their own national or local rules.

The fourth concerns components and spare parts supply chains. Article 11(2) establishes that from 29 May 2028, Member States shall prohibit the sale or installation of systems, components or separate technical units intended for M2, M3, N2 and N3 vehicles type-approved under the new regulation, unless those components are themselves Euro 7-approved. Workshops and parts suppliers serving bus fleets need to be aware of this obligation.

Key dates summary for bus and coach operators

For operational clarity, here are the dates that Regulation (EU) 2024/1257 explicitly sets for M2 and M3 categories, as established in Article 21 and Articles 10 and 11:

• 28 May 2024: regulation enters into force; immediate application of Article 11(3) on extensions to existing type approvals.

• 29 November 2026: deadline by which the Commission must adopt implementing acts with test methodologies for M2, M3, N2 and N3 vehicles (Article 14(9)).

• 29 May 2028: type approval authorities may no longer approve new M2, M3, N2 and N3 vehicle types that do not comply with Euro 7 (Article 10(6)); ban on sale or installation of non-Euro-7-approved components for these vehicles (Article 11(2)).

• 29 May 2029: ban on registration, sale and entry into service of new non-compliant M2 and M3 vehicles (Article 10(7)).

• 31 December 2029: expiry of the temporary derogation for specific M2 and M3 vehicle categories holding a valid Euro VI type approval (Article 10(8)).

• 1 July 2031: the same registration ban extends to M2, M3, N2 and N3 vehicles produced by small-volume manufacturers (Article 10(10)).

Source: Regulation (EU) 2024/1257 of the European Parliament and of the Council of 24 April 2024, OJ L, 8 May 2024.