Drive belt tensioner pulley for Toyota and Lexus. Equivalent to Masuma MIP-1010. OEM references: 16620-31020, 16620-31021, 16620-31040, 16620-31050, 16620-31051. Confirmed applications include engines 1GR-FE, 2GR-FE, 2GR-FSE, 3GR-FSE and 4GR-FSE across Toyota and Lexus models listed in the compatibility table.