| Part Number | Description |
| 43910901 | Access Cover (Beige), B420dn |
| 43910902 | Access Cover (Black), B420dn Black |
| 43992702 | BASE: PLATE , B420dn |
| 41279401 | BEARING PRESSURE, B420dn |
| 43330101 | BEARING TR, B420dn |
| 41584201 | BEARING BALL, B420dn |
| 43222601 | BEARING EJECT, B420dn |
| 41279301 | BEARING REGIST L, B420dn |
| 43963624 | Board 87M 7, B420dn |
| 43998001 | Board TT1, B420dn |
| 43991702 | Cassette 530 sheet (beige), B420dn |
| 43448701 | COLLAR, B420dn |
| 43598801 | COLLAR RESET LEVER, B420dn |
| 43961302 | CONN Cord AMP8P AMP8P, B420dn |
| 43994701 | Cover Rear, B420dn |
| 43994802 | Cover Stacker, B420dn |
| 44019804 | Cover OPE Black, B420dn Black |
| 44019704 | Cover OPE (287) (BLACK), B420dn Black |
| 43994702 | Cover Rear (BLACK), B420dn Black |
| 43994804 | Cover Stacker (600) (BLACK), B420dn Black |
| 43906101 | Cover Front Sub (Beige), B420dn |
| 43910701 | Cover Side L (Beige), B420dn |
| 43910702 | Cover Side L (Black), B420dn Black |
| 43910801 | Cover Side R (Beige), B420dn |
| 43910802 | Cover Side R (Black), B420dn Black |
| 43994707 | COVER: REAR BLACK, B420dn Black |
| 43908003 | COVER: OPE (B420 BLACK), B420dn Black |
| 43994902 | Duplex (BLACK), B420dn Black |
| 43994901 | Duplex, B420dn |
| 43995401 | Eject Roller (FaceDown), B420dn |
| 43400301 | FAN MOTOR, B420dn |
| 43993501 | Frame Lower, B420dn |
| 43994201 | Frame Manual, B420dn |
| 43895001 | Frame Retard, B420dn |
| 43994103 | Front MPT (BLACK), B420dn Black |
| 43993907 | Fuser 120V, B420dn |
| 43993908 | Fuser 230V, B420dn |
| 43905402 | Gear Clutch (blue cable), B420dn |
| 43905201 | Gear Idle Drum Z27 82, B420dn |
| 43905001 | Gear Idle Heat Z27 55, B420dn |
| 43904401 | Gear Idle Z33, B420dn |
| 41279801 | GEAR PRESSURE, B420dn Black |
| 51229201 | GEAR: EJECT ROLLER IDLE, B420dn |
| 41279701 | GEAR REGIST, B420dn |
| 43995901 | Guide Paper (Adhesive), B420dn |
| 43906001 | Guide Paper Front (Beige), B420dn |
| 43993001 | HOLDER: SNS , B420dn |
| 43448601 | HOLDER BU, B420dn |
| 43330801 | HOLDER HEAD, B420dn |
| 41279501 | HOLDER REGIST L, B420dn |
| 41279601 | HOLDER REGIST R, B420dn |
| 43406901 | LED HEAD UNIT 51STB, B420dn |
| 43903301 | Lever in sensor, B420dn |
| 43900401 | LEVER: END f, B420dn |
| 43904001 | LEVER: RESET RIGHT, B420dn |
| 43903601 | LEVER: RESET, B420dn |
| 43206401 | LEVER EJECT SENSOR, B420dn |
| 43906601 | Motor DC Main, B420dn |
| 43963701 | PCB 87H (HVPS), B420dn |
| 43932701 | PCB: PWR UNIT ACDC Switch, B420dn |
| 55631301 | PHOTO INTERRUPTER, B420dn |
| 43911201 | Plate Cover Shield CU, B420dn |
| 43993502 | Plate: PCB 230V, B420dn |
| 43992704 | PLATE: BASE 530 SHEET BLACK (B420), B420dn Black |
| 44002201 | Roller BackUp, B420dn |
| 43995301 | Roller Eject (FaceUp), B420dn |
| 42299701 | Roller Guide, B420dn |
| 43903701 | Roller Regist, B420dn Black |
| 43000601 | ROLLER: FEED, B420dn |
| 42699401 | ROLLER: PICKUP, B420dn |
| 43355101 | Roller: Pinch, B420dn |
| 43222001 | ROLLER BIAS FU, B420dn |
| 43993601 | SENSOR: TONER ADHESIVE, B420dn |
| 44071801 | Shaft Roller Feed, B420dn |
| 43988401 | Solenoid, B420dn |
| 43649701 | SPONGE: ROLLER, B420dn |
| 41584101 | SPRING BIAS, B420dn |
| 43467601 | SPRING HEAD, B420dn |
| 42797101 | SPRING SENSOR IN, B420dn |
| 40386501 | SPRING SNS (F/R), B420dn |
| 43401401 | SPRING TR, B420dn |
| 43979601 | Transfer Roller (282), B420dn |
