Component Placement Volvo Bus Corporation See also, 300, Component placement, Description, Design and function The reader is advised that printed copies are uncontrolled. 42 BB3, ECS1, IB8, RA1, RA1B 9990805 or 88890116 25 – 36 or 37 – 48 (88890116) BB4, ECS2, ECS2B, EU4, IB7 9990805 or 88890116 37 – 48 or 55 – 62 plus 1 – 10 (88890116) BB6, BB6A, BB6B 9990008, 9990805 or 88890116 – or 55 – 62 plus 1 – 4 (88890116) BB5, BB5.A, BB5.B, BS3, BS3B, FUEL, IB6 9990805 or 88890116 49 – 60 BB7, BB7A, BB7B 9990008, 9990805 or 88890116 – or 11 – 22 (88890116) IB1 9990008 or 88890116 — or 11 – 28 (88890116)