Four more carmakers join diesel emissions row

http://www.theguardian.com/environment/2015/oct/09/mercedes-honda-mazda-mitsubishi-diesel-emissions-row

Mercedes-Benz, Honda, Mazda and Mitsubishi have joined the growing list of manufacturers whose diesel cars are known to emit significantly more pollution on the road than in regulatory tests, according to data obtained by the Guardian.

In more realistic on-road tests, some Honda models emitted six times the regulatory limit of NOx pollution while some unnamed 4x4 models had 20 times the NOx limit coming out of their exhaust pipes.

“The issue is a systemic one” across the industry, said Nick Molden, whose company Emissions Analytics tested the cars. The Guardian revealed last week that diesel cars from Renault, Nissan, Hyundai, Citroen, Fiat, Volvo and Jeep all pumped out significantly more NOx in more realistic driving conditions. NOx pollution is at illegal levels in many parts of the UK and is believed to have caused many thousands of premature deaths and billions of pounds in health costs.

All the diesel cars passed the EU’s official lab-based regulatory test (called NEDC), but the test has failed to cut air pollution as governments intended because carmakers designed vehicles that perform better in the lab than on the road. There is no evidence of illegal activity, such as the “defeat devices” used by Volkswagen.

The new data is from Emissions Analytics’ on-the-road testing programme, which is carefully controlled and closely matches the real-world test the European commission wants to introduce. The company tested both Euro 6 models, the newest and strictest standard, and earlier Euro 5 models.

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“MEPs have been fighting for years to reform EU rules on diesel emissions-testing so they reflect real-world emissions. Yet the powerful car lobby and national governments have fiercely resisted these life-saving changes,” said Catherine Bearder, a LibDem MEP and a lead negotiator in the European parliament on the EU’s new air quality law.

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Two car companies, Mercedes and Honda, said that they supported a tightening of the regulations. “Mercedes-Benz emphatically supports the introduction of the WLTP test [which] is designed to supersede the NEDC, with the goal of bringing standardised and real-world consumption closer together,” said the spokesman. “To this end, we actively support the dialogue between industry (through trade group ACEA [European Automobile Manufacturers Association]) and the authorities.” Honda said it supported “additional testing in order to help strengthen regulatory and consumer confidence”.

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