EU HDV Emissions Update

The European Union has notified the WTO under G/TBT/N/EU/1191 a draft delegated regulation amending Regulation (EU) 2024/1257. The proposal introduces updated durability multipliers for gaseous pollutant emissions from heavy-duty vehicles, aiming to strengthen emissions compliance over the vehicle lifecycle.

Regulatory Developments

• The draft regulation focuses on heavy-duty vehicles, specifically trucks and buses classified under categories M3, N2, and N3.
• It proposes to revise durability multipliers, which are factors used to account for the deterioration of emission control systems over time. These multipliers are critical in ensuring that vehicles continue to meet emissions limits throughout their operational life.
• The update is part of the EU’s broader strategy to enhance real-world emissions performance and align regulatory testing with long-term environmental objectives.

Durability Multipliers

Durability multipliers are applied during emissions testing to reflect how pollutant emissions may increase as vehicle components degrade over time. By updating these multipliers, the EU aims to:

• Ensure stricter lifetime emissions compliance
• Improve accuracy of emissions testing frameworks
• Align regulatory assumptions with real-world vehicle performance

Threshold Update

While the notification does not introduce new emission limit values, it updates the methodology and multipliers used to assess compliance over time:

• Adjusted durability multipliers may effectively tighten compliance thresholds over a vehicle’s lifetime
• Manufacturers must ensure emissions remain compliant not only at type approval but throughout durability periods

This represents a shift from static compliance to lifecycle-based emissions performance evaluation

Who is Affected?

The proposal impacts:

• Heavy-duty vehicle manufacturers (trucks and buses)
• Engine and component suppliers
• Importers and distributors of HDVs in the EU
• Testing and certification bodies

Industries relying on logistics and transport fleets may also experience indirect impacts through vehicle design and cost changes.

Compliance Implications

If adopted, manufacturers will need to:

• Reassess emission control system durability
• Update testing and validation strategies
• Ensure compliance across extended vehicle lifecycles
• Potentially redesign components to meet stricter durability-adjusted requirements

This may increase R&D costs and certification complexity, particularly for diesel and alternative fuel heavy-duty vehicles.

Timeline & Consultation

• Notification Date: 17 February 2026
• WTO Comment Deadline: Typically, ~60 days from notification

The draft is currently open for international stakeholder comments under the WTO TBT framework

WTO notification G/TBT/N/EU/1191 signals a targeted but impactful regulatory update focusing on emissions durability for heavy-duty vehicles. While not introducing new emission limits, the revision of durability multipliers strengthens lifecycle compliance requirements, requiring manufacturers to ensure sustained emissions performance over time.

Source: GADSL Update