Use the following table to determine the part number for the field replaceable unit (FRU):
| CCIN or FFC | Type and model | Part number | Description | Location code |
| 25A0 | 8203-E4A, 9407-M15, 9408-M25 | 42R7898 | System backplane | Un-P1 |
| 25A0 | 8204-MMA | 10N9369 | System backplane | Un-P1 |
| 25A0 | 9117-MMA | 03N6902 | System processor backplane | Un-P2 |