NBR NTA-25010 is a drive belt tensioner for selected Toyota and Lexus vehicles. It is used in the accessory / serpentine belt drive system to maintain proper belt tension and stable operation of auxiliary units. Cross references include Toyota / Lexus 16620-25010, 16620-25020, 16620-25011, 16620-25021 and Masuma MIP-1039. Compatible with selected Toyota Camry, RAV4, Avalon, Harrier and Lexus ES applications equipped with A25A-FKS and A25B-FXS engines depending on model, production year and market. Verify the original part number or VIN before ordering.