BOSMAL is the organizer of International Exhaust Emissions Symposia (IEES). There has been a constant increase in interest in this symposium, which has become one of the most important scientific knowledge exchange forums in Poland, focusing on the issue of emission of vehicular exhaust emissions. In the years 2013-2016, there were two symposia the 4th and 5th IEES, attended by 120-140 representatives of scientific institutions from Europe and the USA. In both cases, 23 out of the 25 papers in the event programme were presented by participants representing research centers outside Poland. These symposia are a forum for the exchange of knowledge and experience of experts and specialists related to the automotive industry, mainly those dealing with aspects of exhaust emissions from vehicles, but also other aspects of the operation of motor vehicles. The high level and the importance of the symposium is best evidenced by the participation of well-renowned experts from around the world.