Volvo 21983655 Belt Tensioner Assembly

The 21983655 belt tensioner is an auxiliary drive belt tensioner assembly designed for Volvo and Renault Trucks heavy-duty commercial vehicles. It maintains proper belt tension on the accessory drive system for alternator, water pump, and fan drives. The unit incorporates a spring-loaded tensioning arm with integrated pulley bearing. Original equipment fitment covers Volvo FH, FH16, FM, and FMX series trucks equipped with D13 (VE13) and D16 (VE16) Euro 5 and Euro 6 engines. Cross-application includes Renault Trucks C, K, and T series with DTI13 engines. The tensioner replaces OE numbers 21983655 and 7421983655. Aftermarket cross-references include INA 534078710, SLP BTE-655, and Febi 037.014.