The function of Ensembl gene identifier ENSG00000155463 (OXA1L, OXA1L mitochondrial inner membrane insertase) is as follows. Mitochondrial membrane insertase that mediates the cotranslational insertion of integral membrane proteins into the mitochondrial inner membrane (PubMed:17936786, PubMed:33602856, PubMed:7991568). Essential for the activity and assembly of cytochrome oxidase (PubMed:17936786, PubMed:7991568). Required for the correct biogenesis of ATP synthase and complex I in mitochondria (PubMed:17936786, PubMed:7991568). {ECO:0000269|PubMed:17936786, ECO:0000269|PubMed:33602856, ECO:0000269|PubMed:7991568}.