Promises kept: Since the stricter Euro 7 standards were announced, car manufacturers were warned that under the new conditions, producing mini cars that meet the new emission requirements would be costly, and most would leave the market. Toyota stayed, but installed the Yaris hybrid powertrain in the Aygo X.On one hand, this created a nimble mini car with an official fuel consumption of 26.3 km per liter according to the stricter WLTP standard, with an average emission of just 85 g CO₂ per km,