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Questions and answers on the new ADR 80/04

Euro VI for heavy vehicles

What are the key differences between Euro VI and the current ADR requirements?

The adoption of Euro VI will deliver the following benefits relative to Euro V:

  • an increase in the durability requirements for vehicle emissions control systems
  • a 70 per cent reduction in emissions limits for HC/VOC
  • a 77-80 per cent reduction in the emissions limits for NOx
  • a 50-66 per cent reduction in the mass emissions limits for particulates
  • the introduction of a limit on the number of particles to control fine particle emissions
  • improved emissions tests (laboratory and on-road) to ensure reductions in emissions are also realised during normal operation on the road
  • more stringent requirements for on-board diagnostic systems that monitor the emissions control systems, including a reduction in the thresholds at which a malfunction warning is detected and an increased frequency of monitoring (in-use performance ratio).

Table 1 outlines the key changes in emissions limits from Euro V to Euro VI.

Table 1  Euro V and Euro VI emissions limits for heavy diesel vehicles
Emission Euro V
(Stationary Cycle1)
Euro V
(Transient Cycle2)
Euro VI
(Stationary Cycle)
Euro VI
(Transient Cycle)
Oxides of nitrogen (NOx) 2,000 mg/kWh 2,000 mg/kWh 400 mg/kWh
(80% lower)
460 mg/kWh
(77% lower)
Particulate matter 20 mg/kWh 30 mg/kWh 10 mg/kWh
(50% lower)
10 mg/kWh
(66% lower)

Which stage of Euro VI is being adopted?

The new ADR 80/04 will adopt the Stage C requirements. Further analysis after stakeholder feedback was received in 2021 found Stage C would enable an earlier introduction and achieve a higher net benefit than the original option canvassed in 2020 (Stage D).

Will Australia continue to accept equivalent US and Japanese standards for heavy vehicle emissions?

ADR 80/04 will accept vehicles meeting US emission requirements from 2013 onwards and vehicles meeting Japanese emission requirements from 2017 onwards.

When will the text of the ADR be available?

An exposure draft of the ADR is being provided to key stakeholders for a final review, before the final ADR is made by the Minister. The final ADR is expected to be published in coming weeks.

Will the introduction of Euro VI improve fuel efficiency and reduce CO2 emissions?

The emission control technologies required for Euro VI will not directly improve fuel efficiency or reduce CO2 emissions.

However, as manufacturers are required to reduce CO2 and noxious emissions concurrently in other markets, Australia may gain access to more fuel-efficient engines. Truck and bus manufacturers have advised that their latest Euro VI engines are up to 10 per cent more fuel efficient than previous Euro V models.

Some noxious emissions, such as nitrous oxide, are also more potent greenhouse gases than CO2. The introduction of Euro VI will also help reduce these greenhouse gas emissions.

How will the introduction of Euro VI impact on trucking operators?

The technology required to meet Euro VI will increase the cost of supplying a new truck or bus to Australia by 3 to 5 per cent or $4,000-$6,000. Impacts on purchase prices will depend on exchange rates, supply chains and other changes made as part of a model update.

Euro VI trucks are heavier than equivalent Euro V trucks due to the additional mass required by the additional emission systems. This may reduce the amount of freight they can legally carry.

The National Heavy Vehicle Regulator and National Transport Commission are working with government and industry stakeholders to reforms to mass limits to ensure trucks with advanced safety and emissions do not risk a productivity penalty. These reforms are expected to be resolved before the new ADR becomes mandatory.

In February 2022, the Australian Government and state and territory governments agreed in principle to increase in truck width limits from 2.5 metres to 2.55 metres for trucks fitted with advanced safety features. This will help reduce development costs for meeting Euro VI in Australia.

When will the Government make a decision on Euro 6 for light vehicles?

Previous consultations have raised complex issues that need to be addressed. Light vehicle manufacturers have consistently advised that the higher sulfur and aromatics levels currently permitted in Australian petrol (when compared with many other countries) will cause significant operability issues for the latest Euro 6 vehicles.

Legislation has been adopted to reduce sulfur levels in petrol by the end of 2024. The Government is continuing to consider a pathway to reduce aromatics in petrol to enable Euro 6d to be mandated for all new light vehicles sold in Australia.

1 A stationary cycle test is performed at steady engine speeds, similar to highway operation

2 A transient cycle test is performed at more variable engine speeds, similar to city operation