The authors regret that in Fig. 4a) PM emission of Euro 6a diesel car was incorrect. PM emission of Euro 6a diesel car is 0.0006 g/km in corrected Fig. 4a) below. Accordingly, qualitative emission rating is corrected to 2 for “PM, SVCs” of Euro 6a diesel car in Table 2. [Figure presented] Fig. 4. a) PM and b) sPN emissions for cars tested at −7 °C. The authors would like to apologise for any inconvenience caused.