The Problems that often faced by teachers are how way the students to increase interest andlearning outcomes especially in subjects maintaining gasoline fuel system service. Researcher try to usecooperative learning TAI model (Team Assisted Individualization) in hopes can increase of interest andstudent learning outcomes.This research is a classroom action research (CAR). This study will be done inclass X TKR 2 SMK Negeri 2 Boyolangu. Subjects of this study were all students of class XI TKR 2 bythe number of 34 students. The object of this research is cooperative learning TAI model (Team AssistedIndividualization)The Results show the differences of student activities on lap 2, the students tend to bemore discussion active and give feedback on the material being studied. The results of Post test show thatthe level of mastery learning students improve compared to the previous semester is equal to 93%completed learned while 7% is not completely learned. Student interest is likely to increase with the useof these learning model seen from the results questionnaires.