Component Placement Volvo Bus Corporation See also, 300, Component placement, Description, Design and function The reader is advised that printed copies are uncontrolled. 33 BB4, BB6, BB6A, BB6B, ECS2, EU4, IB7 BB5, BB5A, BB5B, BS3, FUEL, IB6, BB7 IB1 IB2 GBX, IB3 IB4 IB5 2 A16 (ECS) A17 (VECU) A21 (EBS) A27 (LCM) A65 (RECU) A90 (BBM) A125 (Dynafleet) A943 (BIO) A946 (FMS) K1– K17, K25 – K28 F1 – F64, F96 – F99, F90A, F90B