All vehicles registered from 1 October 2006 have to meet Euro 4 legislation. Euro 5 comes into force on 1 October 2009.

The new Euro norms for exhaust reduction impose tough demands on all vehicle manufacturers. The difference in exhaust emissions requirements between a Euro 3 and a Euro 4 engine is considerable. Emissions of nitrogen oxides (NOx) have to be cut from 5 to 3.5 g/kWh, a reduction of 30%. Particulate (PM) emissions must drop from 0.1 to 0.02 g/kWh. This corresponds to a reduction of no less than 80%.

The diagram below shows the dramatic decrease in NOx and PM necessary to meet the Euro 4 and especially Euro 5 legislations:

Trucks and heavy commercial vehicles with SCR technology will meet the Euro 4 exhaust gas emission standards prescribed from 2006, and will – in an improved version – also be able to meet the next stage, Euro 5, which comes into effect in 2009.