Peugeot and Citroën have now sold more than 500,000 particulate filter-equipped vehicles since the system was introduced as a claimed world first on the Peugeot 607 2.2 litre HDi model in May 2000.

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Announced in April 1999, the particulate filter system was first installed on the 607, and then on the Citroën C5, the Peugeot 406 and 307, and the Peugeot 807 and Citroën C8 MPVs. Since then, and for the first time in car history, emissions from particulate filter-equipped diesel vehicles are claimed to have declined to nearly zero.

Thanks to this breakthrough, PSA Peugeot-Citroen claims, diesel engines not only offer low fuel consumption and CO2 emissions, but also an exceptional performance in terms of contaminant emissions that goes far beyond the demands of current legislation.

Between the two brands, Peugeot and Citroën currently offer six vehicle families with the particulate filter system. In the next two years, the number will increase to 11 and total production will rise to one million particulate filter-equipped vehicles.

The first generation of particulate filters required servicing every 80,000 km. Following further R&D, a new system was introduced in November 2002 that, depending on the version, can go without servicing for 120,000 km thanks to a new additive.

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With the deployment of a new filter medium architecture known as “octosquare” (a reference to the shape of the filter’s intake channels), PSA Peugeot Citroën will launch a particulate filter that does not need any servicing in 2004.

As the particulate filter is gradually extended to other models, the diesel engine will continue to gain market share, the French car maker said.