The study of this study was to further examine the simultaneous and partial effects of brand trust, brand image, and brand loyalty on buying decisions for Nipponparts at CV.Motoroli. Using a quantitative method with Nipponparts buyers at CV. Motoroli was used as a population and taking acsamplecofc100crespondents. Thecsamplingctechnique iscpurposivecsampling, reinforced by simultaneous tests, partial tests, multiple linear regression tests, and coefficientcofcdeterminationctests. Thecresultscshowedcthatcthe 3 independent variables hadcacpositivecandcsignificantceffectconcthe dependent variable. The research tool uses the SPSS Statistics 25 program. Keywords: Brand Trust, Brand Image, Brand Loyalty, Buying Decision.