Part Number : 159LH85. Application : Isuzu Amigo Accessory Drive Belt. Part Type : Accessory Drive Belt. 1989-1993 Isuzu Amigo 2.3L GAS. 1989-1994 Isuzu Amigo 2.6L GAS. Due to thermal forces in the vehicle engine, this variable notched belt tightens on the drive as it heats up to prevent slippage, improve belt performance and reduce noise.