This thesis presents an algorithm that calculates the mounting angles for a black box device installed on a car. When mounting the device on a car, technicians could use specific machines to install it. But this process introduces errors and the devices would not be installed the same way on different cars. This results in incorrect information coming from the car. Moreover, the installation process requires more attention and so it results more difficult and expensive. To solve this problem and obtain correct information from the car, the axes of the sensor inside the device have to be aligned with the axes of the car.