Small diesel cars such as the Peugeot 208 HDi will be vulnerable to post #Dieselgate EU emissions testing reforms.

Brussels, Belgium - A tougher European testing regime following Volkswagen's emissions test cheating scandal could mean new small diesel car models are modified or withdrawn.

When news broke in September 2105 that Volkswagen had used software to conceal nitrogen oxide emissions, the European Commission was already working on plans to reduce a gap between levels of pollution in tests and in the real world.

The European Automobile Manufacturers' Association said on Wednesday the scandal had accelerated agreement on the new rules, which were endorsed by the European Parliament this month.

EU promises tougher emissions testing

For the carmakers, implementing real driving emissions laws means new anti-pollution technology that will add weight and cost - which is a bigger problem for small cars than larger ones.

ACEA emissions and fuel director Paul Greening said the group had consulted its members, which include Volkswagen, and estimated five percent of planned diesel models might be withdrawn or changed during a first phase of implementation, and more later.

“It may be the case that manufacturers will have to look very carefully at their portfolio of smaller diesel vehicles,” he said, “because the additional cost of that technology and the ability to package that technology within a smaller platform is a big challenge.”

The first phase of real driving emissions testing will be implemented from September 2017, although some pollution above official limits will be tolerated to allow carmakers to adapt. But in 2021, the allowed leeway will be halved to 50 percent above official limits.

Diesel technology, which accounts for about half of new cars in Europe, has been promoted to address climate change because, though high in nitrogen oxide emissions, it is low in carbon dioxide.

Greening said the ACEA believed there was a strong market for diesel and the best technology meant new models were clean.

‘HYBRIDS CLEANER THAN DIESELS’

Environmental campaigners dispute that and say sticking to the technology hands a competitive advantage to parts of the world investing in hybrid and electric vehicles.

A briefing for the European Parliament on Wednesday by Eckard Helmers, a professor at Germany's Trier University, said that in Japan, which has developed hybrid technology rather than diesel, CO2 emissions from new cars were 16 percent lower than in Europe.

He focused on another diesel by-product known as black carbon - or soot - which is a potent planet-warming emission, but not addressed in UN action to combat climate change.

Planet-warming emissions of diesel cars, counting black carbon, were higher than previously stated, he said, and cited tests in France that found filters to combat the problem did not work on 75 percent of cars.

Reuters

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