The purpose of this research was test the influence of tax administration reform, tax penalty, service quality and taxpayers awareness on motor vehicles taxpayer level of compliance. The subject in this research that motor vehicles taxpayer registered in the Samsat Magelang City. The sampling technique using convenience sampling method with sample of 100 respondents. A 100 questionnaires administered then 97 questionnaires were return and could be examined using the multiple linear regression model. Analysis tool used in this research is the SPSS 20. aaaaaaaThe results showed that tax penalty and service quality have influence on increase tax compliance of motor vehicles, while tax administration reform and taxpayers awareness have no influence on increase tax compliance of motor vehicles.