| Description | Part Number |
| Lexmark B2650dw Mono Laser | 36SC471 |
| Bezel (MS621) | 41X1158 |
| Cartridge barrel sensor kit | 41X1988 |
| Cartridge gearbox | 41X1237 |
| Control panel covers (MS621) | 41X1978 |
| Control panel display assembly (MS521, MS621) | 41X1627 |
| Controller board (MS621) | 41X1194 |
| Cooling fan | 41X2259 |
| CS720, CS725, CX725 Card for IPDS | 41X1004 |
| CS720, CS725, CX725 Card for PRESCRIBE | 41X1006 |
| CS720, CS725, CX725 Forms and Bar Code Card | 41X1002 |
| Duplex assembly | 41X1176 |
| Dust cover, 550-sheet tray | 40X8521 |
| Flat cable (MS621) | 41X2257 |
| Front input guide | 41X1184 |
| Fuser actuator | 41X2255 |
| Fuser, 110V | 41X1178 |
| Fuser, 220V | 41X1179 |
| Hard disk, 500GB (USB) | 41X1026 |
| Index sensor | 40X8044 |
| Interconnect cable | 41X1236 |
| Jam access cover | 41X1183 |
| Left cover | 41X1168 |
| Main drive gearbox | 41X1224 |
| MarkNet N8230 Fiber Ethernet 100BASEFX (LC), 1000BASE-SX (LC) (Fiber + side backpack) | 41X1945 |
| Marknet N8372, Front WiFi FSM | 41X1872 |
| Media present sensor flag | 40X8800 |
| Memory, 256MB User Flash Memory | 41X1010 |
| MPF gearbox (MS/MX52x, MS/MX62x) | 41X1182 |
| MPF pick roller and separator pad | 41X1197 |
| MPF solenoid | 41X1213 |
| MPF with front access cover | 41X2605 |
| MS621, MS/MX622 Fuser Maintenance Kit, 110V | 41X1225 |
| MS621, MS/MX622 Fuser Maintenance Kit, 220V | 41X1226 |
| Nameplate | 41X1164 |
| Optional 250-sheet tray | 41X1217 |
| Optional 550-sheet tray | 41X1216 |
| Output extender | 41X1231 |
| Parallel 1284-B Interface Card (MS610de, MX5/61x) | 40X8524 |
| Parallel cable, packaged (3 m) | 40X1367 |
| Parallel card, thin (MS521) | 41X2051 |
| Pick roller | 41X1239 |
| Pick roller assembly | 41X1196 |
| Pick tire | 41X1198 |
| Pick/lift motor gearbox | 41X1989 |
| Power supply, 100V/110V | 41X1201 |
| Power supply, 220V | 41X1202 |
| Printhead | 41X1185 |
| Rear access door | 41X1232 |
| Rear door and cover | 41X1170 |
| Redrive assembly (MS621) | 41X1204 |
| Redrive gear plate | 41X2256 |
| Reverse solenoid | 41X1214 |
| Right access cover | 41X1233 |
| Right cover | 41X1166 |
| RS-232C Serial Interface Card (MS610de, MX5/61x) | 40X8523 |
| Sensor (bin full) | 41X1211 |
| Sensor (duplex and input) | 41X1206 |
| Sensor (front door) | 41X1209 |
| Sensor (MPF paper present) | 41X1210 |
| Sensor (trailing edge) | 41X1208 |
| Sensor (tray present) | 41X1238 |
| Separator roller assembly | 41X1212 |
| Simplified Chinese Font Card | 41X1013 |
| Smart card | 41X2055 |
| Software CD | 3086579 |
| Standard 550-sheet tray insert | 41X1987 |
| Toner cartridge smart chip contact | 41X1162 |
| Toner density sensor | 40X8046 |
| Top cover | 41X1172 |
| Transfer roll | 40X8393 |
| Tray, 250-sheet tray insert (optional tray) | 41X1221 |
| Tray, 550-sheet tray insert (optional tray) | 41X1222 |
| USB cable, packaged (2 m) | 40X1368 |
| Wireless network card | 41X1372 |
