| Description | Part Number |
| MX331adn Enterprise mono laser printer | 29S0150 |
| ADF cover | 41X2510 |
| ADF separator pad | 41X2511 |
| ADF tray | 41X2428 |
| Controller Board (MX331adn) | 41X2659 |
| Control panel assembly | 41X2595 |
| Marknet N8372, Front WiFi FSM | 41X1872 |
| Scanner (MX331) | 41X2597 |
| Scanner pivot arm | 41X2596 |
| 250-sheet tray | 41X2585 |
| Duplex guide | 41X2712 |
| Front door with MPF pick roller | 41X2584 |
| Fuser, 115V | 41X2586 |
| HVPS | 41X2592 |
| Left cover | 41X2579 |
| Left front door link | 41X2578 |
| LVPS, 75W and 120V | 41X2590 |
| Main drive gears kit | 41X2576 |
| Main fan | 41X2636 |
| Marknet N8372, Front WiFi FSM | 41X1872 |
| Pick roller clutch | 41X2391 |
| Pick separator roller | 41X2575 |
| Printhead | 41X2573 |
| Rear door | 41X2582 |
| Right cover | 41X2580 |
| Scanner (MX331) | 41X2597 |
| Scanner pivot arm | 41X2596 |
| Transfer roller, bearing, and spring | 41X2587 |
| Upper front cover with decals | 41X2670 |
