Air pollution due to car emissions is a major problem in many places around the world. Cars produce toxic gases such as NOx, CO2, CO, and various particulate matter, all of which have adverse medical effects. Analyzing the harmful substances is very difficult and traditional tests often provide false data, are hard to do, and also require very expensive equipment. This project is aiming to replace traditional test using a rolling road with a real-world test using easily-available emissions analyzer. It is constructed from low-cost, off-the-shelf components, together with 3d printed parts. The project was created in order to adress the problem of air pollution in my city (Sarajevo) and other cities in a similar state.