The present paper focuses on indentifying and studying the success factors of the strategy of foreign investors through the creation of a 100% subsidiary. The major contribution of this study is to determine the success factors regarding the direct implementation process of the Tunisian business in foreign markets. The empirical research of the study relies on the conduct of a survey inside the COFICAB group, operating in the automobile sector. The group decided to choose the strategy of FDI (foreign direct investment). Data of the survey were collected from implementing several interviews inside the group COFICAB. The thorough analysis of the data collected authorized to elucidate that the success of such strategic is highly related to a variety of characteristics of the company, its environment and its leaders. Key Words: FDI Strategy, Success Factors, Endogenous and Exogenous Characteristics, Entrepreneurial Theory.