Part Type: Accessory Drive Belt Tensioner Assembly. 2000 Audi A4 Submodel: Base; Engine: 1.8L L4;EngineCode: ATW; EngineVIN: C; Ribbed V-Belt; For Alternator and Power Steering Belt; With OE No. 2001 Audi A4 Submodel: Base; Engine: 1.8L L4; Ribbed V-Belt; For Alternator and Power Steering Belt; With OE No.