Understanding Euro 6 Emissions Standards

In an increasingly environmentally conscious world, vehicle emissions are a subject of paramount importance. Across the UK and the wider automotive industry, significant measures are being implemented to curb the impact of high-emission vehicles. Cities are establishing low-emission zones, and manufacturers are steadily shifting towards more eco-friendly engines and fuel types. This industry-wide transformation is paralleled by a growing consumer demand for electric and hybrid vehicles, with sales showing a notable increase between 2014 and 2019. At the heart of these changes lies the 'Euro 6' standard – a set of regulations designed to limit the release of hazardous gases and particles from cars. Every new vehicle model produced must now meet these stringent Euro 6 standards, which also form the basis for determining vehicle eligibility for low-emission zones.

What Exactly Are Euro 6 Emissions Standards?

The Euro 6 emissions standards are designed to provide a clear benchmark for the contribution of each vehicle on the road to air quality. These standards differentiate between petrol and diesel engines, with a primary focus on reducing emissions of nitrogen oxides (NOx) and hydrocarbons (HC).

Key Emission Limits for Euro 6:

For petrol cars, the Euro 6 standard dictates that emissions exceeding 60mg/km of certain pollutants are non-compliant. For diesel cars, this threshold is set slightly higher at 80mg/km. Failure to comply with these standards can result in significant daily charges for drivers entering certain city centres with congestion charges, potentially costing up to £12.50 per day to contribute towards improving air quality.

As stricter measures continue to be introduced to combat emissions, it is highly probable that further incentives will be offered to encourage drivers to transition to Euro 6-compliant vehicles. Here's a breakdown of the current standards:

The Evolution of Euro 6 Testing: From Lab to Road

Historically, Euro 6 emissions tests were conducted in controlled laboratory environments using rolling roads. However, it became apparent that these artificial test conditions could be manipulated, leading to discrepancies between laboratory results and real-world emissions. In response to this, testing procedures have evolved significantly.

Real Driving Emissions (RDE) Testing:

The new benchmark for emissions testing is the Real Driving Emissions (RDE) test. This involves monitoring emissions during actual driving on public roads, providing a much more accurate reflection of a vehicle's environmental performance. This shift to RDE testing led to an adjustment in the Euro 6 limits to account for the variations in fuel economy experienced in outdoor driving scenarios.

From January 2022, all new cars are mandated to pass the RDE test. Furthermore, a new iteration of this test, known as RDE2, has introduced even stricter limits. These new limits are designed to align more closely with the original, more stringent indoor test levels and are often referred to under the designation Euro 6d.

Is Your Vehicle Euro 6 Compliant?

Determining if your car meets Euro 6 standards is generally straightforward. Any vehicle registered from September 2015 onwards, when Euro 6 became mandatory, will be Euro 6 compliant by default. Many vehicles manufactured before this date may also meet Euro 6 regulations, but older models are more likely to adhere to the previous Euro 5 standards.

To check your car's compliance, you can compare its emissions data against the Euro 6 standards detailed in the table above. Alternatively, numerous online Euro 6 checkers can provide this information by simply entering your vehicle's registration details.

Understanding the Nuances: Euro 6d-Temp and Euro 6d Final

The Euro 6 regulations have been implemented in stages, leading to various designations such as Euro 6d-Temp and Euro 6d Final. These stages reflect the progression of testing methodologies and the tightening of emission limits.

Euro 6c (also known as Euro 6.1 or EU6.1):

This designation indicates compliance with the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) regulations. All new vans and pickups were required to meet this standard by September 2019.

Euro 6d-Temp (also known as Euro 6.2 or EU6.2):

This stage introduced the Real Driving Emissions (RDE) element into the WLTP testing mix. The aim here was to make MPG figures more realistic by incorporating on-road driving conditions. All vans and pickups had to meet this standard by September 2020.

Euro 6d Final (also known as Euro 6.3 or EU6.3):

This represents the final stage of the Euro 6 emissions standards and came into force in January 2022. While no fundamental changes were made, the RDE component of the test was made slightly more rigorous, requiring some manufacturers to make minor adjustments to ensure closer alignment between laboratory and real-world fuel economy test performances. When referring to Euro 6d in general, it typically means Euro 6d Final.

The Future: Euro 7 and Beyond

Following the Euro 6 standards, the next iteration will be Euro 7. While the exact introduction date is still under development, it is tentatively expected around 2025. It's possible that vans might receive a year's grace, similar to the Euro 6 rollout, meaning Euro 7 could impact them from 2026. It is highly anticipated that Euro 7 will be the final set of emissions regulations for vehicles with internal combustion engines (ICE). Projections suggest that Euro 7 will bridge the gap to a future where only zero-emission vehicles are sold, with 2030 being a likely timeframe for this transition.

Euro 6 vs. Euro 5: A Comparative Look

The preceding Euro 5 emissions standards primarily focused on carbon dioxide (CO2) emissions. In contrast, Euro 6 places a significant emphasis on reducing nitrogen oxide (NOx) emissions. Additionally, Euro 6 aims to decrease emissions of sulphur dioxide, carbon monoxide, hydrocarbons, and diesel particulate matter, alongside CO2.

Euro VI: A Different Standard for Heavy Duty Vehicles

It is important to distinguish Euro VI from Euro 6. Euro VI refers to the emissions testing regime for 'heavy-duty' vehicles. Vans with a reference mass (unladen weight plus 25kg) exceeding 2,380kg can be classified as heavy-duty and therefore subject to Euro VI testing rather than Euro 6. Vehicles tested under Euro 6 and its various updates are classified as 'light-duty' vehicles.

Advantages and Disadvantages of Euro VI:

Heavy-duty vehicles, currently, are not subject to WLTP testing. This might mean they require less sophisticated emissions control technology, potentially leading to reduced costs, improved fuel economy, or even increased payload. However, this could also make Euro VI vehicles more susceptible to future restrictions that Euro 6 vehicles might not face.

Given the weight crossover, some vehicles may be eligible for either heavy-duty or light-duty emissions testing. The original purchaser of the vehicle makes this decision. Therefore, when purchasing a used van, it is crucial to carefully check the documentation to understand which emissions standard it adheres to.

Impact of WLTP on Van Conversions

The WLTP test procedure's emphasis on accuracy means that specific fuel economy and emissions figures are required for every vehicle variant, including those with different standard and optional equipment. This can pose a challenge for the van and pickup conversion market due to the wide variety of conversions available. The original manufacturer remains ultimately responsible for ensuring that the vehicle bearing its badge complies with regulations, even if they are not directly involved in the conversion process.

To address this, manufacturers provide WLTP calculators to their converter partners, enabling them to compute an official MPG rating for vehicles with refrigeration units, flatbeds, or other modifications.

Does Euro 6 Reduce Payload?

The addition of emissions control technology, such as AdBlue and Selective Catalytic Reduction (SCR) systems, does introduce a weight penalty. A heavier vehicle means less payload capacity within its legal Gross Vehicle Weight (GVW). However, as time progresses since the introduction of Euro 6 legislation, vehicles have undergone numerous changes. It can be challenging to definitively attribute any reduction in payload solely to emissions requirements, as engine and specification updates are common regardless of regulations.

Benefits of Euro 6 for Vans and Pickups

The transition to Euro 6 has generally led to increased engine efficiency, which often translates to better fuel economy, although this is not always guaranteed. Many updates have also resulted in increased engine power. The latest requirements aim to improve on-road efficiency and provide official MPG figures that are more representative of real-world driving.

Furthermore, Euro 6 reduces CO2 emissions, contributing to a lower carbon footprint for companies with large fleets, which can also have tax implications. If the government were to implement a CO2-based road tax system for Light Commercial Vehicles (LCVs) in place of the current fixed rate, owner-drivers of lower CO2 emitting vehicles would also benefit.

AdBlue: The Essential Emission Control Fluid

AdBlue is the widely recognised brand name for the exhaust fluid used in SCR emissions control technology. This fluid is added to a separate tank in compatible vehicles. The process is as simple as topping up the windscreen washer reservoir. AdBlue works by breaking down harmful NOx emissions into less harmful nitrogen and water vapour.

The cost of AdBlue can vary, typically ranging from £8 to £20 per litre, with bulk purchases offering better value. It can be purchased from service stations, truck stops, dealerships, and motor factors.

Are All New Vans Euro 6d Compliant?

As of January 2022, new vehicles should be Euro 6d compliant. However, manufacturers are typically allowed a period to sell off any remaining stock that does not meet new legislation. This means that it might still be possible to purchase a pre-Euro 6d van as a 'new' vehicle after the official deadline. Currently, there is some uncertainty regarding the exact allowances, and industry bodies are seeking further clarification.

Moreover, the ongoing semiconductor crisis and resulting stock shortages could render concerns about leftover vehicles irrelevant, as demand often exceeds supply. The 'carry-over allowance' (or derogation) is usually utilised to clear excess stock. With current market conditions, excess stock is rare, meaning van manufacturers may have few, if any, leftover vehicles.

Euro 6d Compliance Across Manufacturers

Here's a look at how major van and pickup manufacturers are addressing the latest Euro 6 regulations:

• Dacia: The Dacia Duster Commercial, based on a passenger car, is well-equipped to meet Euro 6 emissions regulations.
• Ford: Ford has updated its entire model range. While some engine options have been discontinued for certain models, new Ford Transit, Transit Custom, Transit Connect, Transit Courier, and Ranger pickups now meet Euro 6d standards.
• Isuzu: The latest 1.9-litre Isuzu D-Max engine, updated in 2020, is fully Euro 6d compliant across the entire range.
• Iveco: The Iveco Daily was an early adopter of RDE testing, with its Blue Power models launched in 2017. The Euro 6d Final upgrade is part of the MY22 update, with vehicles expected to arrive in the UK before the end of 2021.
• Land Rover: The Discovery Commercial and Defender Hard Top are derived from passenger cars and thus already meet the latest Euro 6 regulations.
• MAN: The MAN TGE, being mechanically similar to the Volkswagen Crafter, generally mirrors its compliance. The rear-wheel-drive model is offered as a heavy-duty Euro VI vehicle only, not under Euro 6d.
• Maxus: Maxus transitioned to Euro 6d compliance from November 2021, ensuring all Deliver 9 models meet the regulations for 2022.
• Mercedes-Benz: Mercedes-Benz confirms that its Sprinter and Vito models are Euro 6d compliant. The new Citan, launched in 2022, is also Euro 6d ready.
• Mitsubishi: Following its exit from the UK market, Mitsubishi vehicles previously offered in the UK only reached Euro 6d-Temp compliance.
• Nissan: The Navara pickup is no longer sold in the UK, with its most recent update achieving Euro 6d-Temp compliance. New Townstar, Interstar, and Primastar van models are launching with fully compliant Euro 6d engines.
• Renault: The new Kangoo, arriving in 2022, will be fully compliant. The recently updated Trafic already meets the standards, and the Master has received minor engine line-up tweaks to ensure compliance from September 2021.
• Stellantis (Citroën, Fiat, Peugeot, Vauxhall): All models from these brands are expected to meet the new regulations by 2022, with most already compliant.
• Toyota: The Proace and Proace City, based on Stellantis vans, are Euro 6d compliant. The Hilux pickup has been compliant since its revised model launch in late 2020, and the Land Cruiser Commercial, based on a passenger vehicle, also meets the latest regulations.
• Volkswagen: All VW models are now Euro 6d compliant. The rear-wheel-drive Crafter was an exception but is not currently available for order and is expected to return in 2022.

In summary, the Euro 6 emissions standards, particularly with the introduction of RDE testing and the subsequent Euro 6d designations, represent a significant step forward in reducing vehicle emissions and improving air quality. Understanding these standards is crucial for both new vehicle buyers and those looking to navigate the complexities of emissions-related regulations.

Frequently Asked Questions

Q1: What is the main difference between Euro 5 and Euro 6?
Euro 5 primarily focused on CO2 emissions, while Euro 6 places a strong emphasis on reducing nitrogen oxides (NOx) and particulate matter, especially for diesel vehicles.

Q2: Does Brexit affect Euro 6 standards in the UK?
No, it is highly unlikely. Vehicle manufacturers operate on a global scale, and the UK market is not significant enough to warrant separate, major changes. Standards are expected to remain aligned with European regulations.

Q3: Is Euro VI the same as Euro 6?
No. Euro VI applies to heavy-duty vehicles, while Euro 6 applies to light-duty vehicles like cars and most vans.

Q4: Do I need to modify my current vehicle to meet Euro 6?
No, the Euro 6 regulations apply at the point of first sale. You do not need to modify your existing vehicle.

Q5: What is the purpose of AdBlue?
AdBlue is a fluid used in SCR systems to convert harmful nitrogen oxides (NOx) in exhaust gases into harmless nitrogen and water vapour, helping diesel vehicles meet Euro 6 emission standards.

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