| Item | Part No. | Part Name | Qty | Serial No. |
| (421-57-H1300) | SEAT ASSEMBLY | | H51018- |
| 1 | 421-57-H0P02 | CUSHION, BACKREST | | H51018- |
| 2 | 421-57-H0P03 | CUSHION, SEAT | | H51018- |
| 3 | 421-57-H0P04 | HEADREST | | H51018- |
| 4 | 423-57-H0S36 | GUIDE | | H51018- |
| 5 | 423-57-H0S74 | AIR CUSHION | | H51018- |
| 6 | 421-57-H0P07 | KIT, SMALL PARTS, AIR CUSHION | | H51018- |
| 7 | 423-57-H0S72 | VALVE | | H51018- |
| 8 | 423-57-H0S41 | ACTUATOR, BACKREST | | H51018- |
| 9 | 423-57-H0S40 | HANDLE, BACKREST | | H51018- |
| 10 | 423-57-H0S42 | BEARING | | H51018- |
| 11 | 423-57-H0S43 | STOPPER | | H51018- |
| 12 | 423-57-H0S44 | COVER | | H51018- |
| 13 | 423-57-H0S45 | COVER | | H51018- |
| 14 | 421-57-H0P13 | FRAME | | H51018- |
| 15 | 423-57-H0S46 | GUIDE | | H51018- |
| 16 | 20K-57-31860 | REST | | H51018- |
| 17 | 20K-57-31610 | BOX | | H51018- |
| 18 | 423-57-H0S51 | ADJUSTER | | H51018- |
| 19 | 423-57-H0S49 | ACTUATOR | | H51018- |
| 20 | 423-57-H0S50 | BRACKET | | H51018- |
| 21 | 423-57-H0S56 | ADJUSTER | | H51018- |
| 22 | 423-57-H0S52 | LEVER | | H51018- |
| 23 | 423-57-H0S53 | BRACKET | | H51018- |
| 24 | 423-57-H0S54 | BRACKET | | H51018- |
| 25 | 423-57-H0S55 | COVER | | H51018- |
| 26 | 421-57-H0P18 | ADJUSTER | | H51018- |
| 27 | 421-57-H0P19 | BOLT KIT | | H51018- |
| 28 | 423-57-H0S57 | SEAT BELT | | H51018- |
| 29 | 421-57-H0P28 | SEAT BELT | | H51018- |
| 30 | 421-57-H0P21 | COMPRESSOR | | H51018- |
| 31 | 423-57-H0S71 | KIT, SMALL PARTS, COMPRESSOR | | H51018- |
| 32 | 421-57-H0P23 | WIRING HARNESS | | H51018- |
| 33 | 421-57-H0P24 | KIT, SMALL PARTS, CUSHION | | H51018- |
| 34 | 421-57-H0P25 | KIT, SMALL PARTS, BOX | | H51018- |
| 35 | 421-57-H0P26 | KIT, SMALL PARTS, ADJUSTER | | H51018- |
| 36 | 421-57-H0P27 | KIT, SMALL PARTS, ACTUATOR, BACKREST | | H51018- |
| 37 | 421-57-H0P29 | ARM REST, LHS | | H51018- |
| 38 | 421-57-H0P30 | ARM REST, RHS | | H51018- |
