Component of the MITRAC (mitochondrial translation regulation assembly intermediate of cytochrome c oxidase complex) complex, that regulates cytochrome c oxidase assembly. Component of the MITRAC (mitochondrial translation regulation assembly intermediate of cytochrome c oxidase complex) complex, the core components of this complex being COA3/MITRAC12 and COX14. Interacts with COA3. Belongs to the SURF1 family.