| Description | Part Number |
| 128MB DDR DRAM DIMM | 40X5937 |
| 160+ GB hard disk | 40X7058 |
| 250-sheet tray C54x, X543, X54x | 40X5419 |
| 256MB DDR DRAM DIMM | 40X5938 |
| 512MB DDR DRAM DIMM | 40X5939 |
| 550-Sheet Duo Drawer with 100-Sheet MPF C54x, X54x | 40X2284 |
| 550-Sheet Duo Drawer with 100-Sheet MPF C54x, X54x | 40X6997 |
| 550-Sheet Duo Drawer, 100-Sheet MPF tray C54x, X543, X544 | 40X5435 |
| 550-Sheet Duo Drawer, 100-Sheet MPF tray C54x, X54x | 40X2285 |
| 550-Sheet Duo Drawer, 100-Sheet MPF tray C54x, X54x | 40X7609 |
| 550-Sheet MPF latch cover, C546, X546 | 40X2512 |
| ADF Cable | 40X5479 |
| ADF Flatbed Cushion, Duplex | 40X5535 |
| ADF input tray | 40X5470 |
| ADF rear duplex cover | 40X5478 |
| ADF Separator pad | 40X5472 |
| ADF Separator roller | 40X7545 |
| AIO Back cable cover | 40X5489 |
| AIO Link | 40X5537 |
| Bin full flag | 40X5872 |
| Cable packet | 40X5423 |
| Card for IPDS, X548 | 40X7510 |
| Card for PRESCRIBE Emulation, X548 | 40X7507 |
| Card PCBA EPROM | 40X6518 |
| Controllercard, X548 | 40X6514 |
| Duplex ADF | 40X8092 |
| Duplex reference edge | 40X2263 |
| Duplex reference edge | 40X5803 |
| Dust (Extender) cover | 40X5441 |
| Fax card | 40X7054 |
| Fax interface cable | 40X5485 |
| Flash Card 64MB | 40X1455 |
| Flatbed pivot link | 40X1569 |
| Forms and Bar Code Card, X548 | 40X7513 |
| Front cover | 40X5538 |
| Front flatbed hinge | 40X2253 |
| Front middle cover | 40X5490 |
| Fuser assembly, 110-120V, C54x, X54x | 40X7562 |
| Fuser assembly, 220-240V, C54x, X54x | 40X7563 |
| Fuser Maintenance kit, 110-120V, C54x, X54x | 40X2254 |
| Fuser Maintenance kit, 220-240V, C54x, X54x | 40X2255 |
| Fuser drive motor | 40X5415 |
| Fuser exitsensor | 40X5413 |
| High voltage power supply | 40X5405 |
| Image transfer unit (ITU) | 40X5403 |
| Imaging unit contact (Pogo pin) | 40X5421 |
| ITU paper path thermistor | 40X5429 |
| LCD (with ground cable) display 7-inch | 40X6521 |
| LED flatbed assembly | 40X7529 |
| Left cover | 40X5417 |
| Lexmark PrintCryption Card | 40X7051 |
| Lower leftframe and lower right frame with cable cover | 40X5422 |
| Low-voltage power supply (universal power supply) | 40X5409 |
| Main drivegear assembly, with motors | 40X5412 |
| Narrow media flag | 40X0411 |
| Operator panel bezel cover | 40X6523 |
| Operator panel cover with keypads, sleep button and light pipe | 40X6519 |
| Operator panel frame cover | 40X6520 |
| Output bintray | 40X5484 |
| Paper pickmotor drive assembly | 40X1557 |
| Photo sensor (one per package) | 40X5426 |
| Pick tires | 40X5168 |
| Power cord; 2.5 m, 8 ft. Right angle, US, CA, LA | 40X0269 |
| Printhead | 40X5411 |
| Redrive spacer screws | 40X2252 |
| Release lever | 40X5536 |
| Right cover | 40X5486 |
| Scanner left cover | 40X5488 |
| Scanner right cover | 40X5487 |
| Speaker | 40X6517 |
| Toner cover | 40X5534 |
| Toner meter cycle card | 40X5404 |
| Toner patch sensors, left or right (one in package) | 40X5414 |
| Top over assembly | 40X5482 |
| UICC cable | 40X6516 |
| UICC card | 40X6515 |
| USB (for thumbdrive) cable | 40X5480 |
| USB cable,packaged (2 m) | 40X1368 |
| Waste toner bottle contact block | 40X7046 |
