Component of the mitochondrial outer import machinery (MIM) complex that mediates transport of proteins into mitochondrial compartments (PubMed:33138913). Promotes the insertion of tom70 into the outer mitochondrial membrane (PubMed:33138913). Promotes the insertion of atg43 into the outer mitochondrial membrane (PubMed:33138913). The MIM complex cooperates with the receptor tom70 in binding of precursor proteins and promotes their insertion and assembly into the outer membrane (By similarity). Involved in import of the subset of proteins with multiple alpha-helical transmembrane segments (By similarity). Required for the assembly of the TOM (translocase of outer membrane) receptor complex, which is responsible for the recognition and translocation of cytosolically synthesized mitochondrial preproteins (By similarity). Component of the mitochondrial outer import machinery (MIM) complex containing at least mim1 and mim2 (PubMed:33138913). Interacts with mim2 (PubMed:33138913). Interacts with mitophagy receptor atg43 (PubMed:33138913). Abnormal localization of atg43 to the outer mitochondrial membrane (PubMed:33138913). Severely decreases vegetative cell population growth (PubMed:33138913). Belongs to the MIM1 family.