The emission standard of the vehicle, as defined by European Union directives. It regulates the limits for exhaust emissions of new vehicles sold in EU member states.

Euro 1 standards (1993)

Directives 91/441/EEC (passenger cars only) or 93/59/EEC (passenger cars and light trucks).

Euro 2 standards (1996)

Directives 94/12/EC or 96/69/EC.

Euro 3 standards (2000)

Directive 98/69/EC.

Euro 4 standards (2005)

Directive 98/69/EC, further amendments in 2002/80/EC. Weighted average of Euro 4 vehicles with either SCR or EGR NOx reduction.

Euro 5 standards (2009)

Regulation 715/2007/EC. Weighted average of Euro 5 vehicles with either SCR or EGR NOx reduction