Serpentine Belt + Idler Pulley 1 ,Serpentine Belt + Idler Pulley 2. Serpentine Belt + Tensioner Assembly 1 ,Serpentine Belt + Tensioner Assembly 2. Serpentine Belt + Idler Pulley + Tensioner Assembly 1 ,Serpentine Belt + Idler Pulley + Tensioner Assembly 2.