| Item | Part No. | Part Name | Qty | Serial No. |
| 20Y-57-21110 | SEAT ASS'Y | 10001- | ||
| 1 | 20Y-57-21120 | CUSHION | 10001- | |
| 2 | 20Y-57-21130 | ADJUSTER | 10001- | |
| 2A | 01010-50845 | BOLT | 10001- | |
| 2B | TG402-0830-3 | BOLT | 10001- | |
| 2C | TG12921-05730- | BUSHING | 10001- | |
| 3 | 20Y-57-21140 | CUSHION | 10001- | |
| 4 | 20Y-57-21150 | ARM REST,L.H. | 10001- | |
| 4A | TG92489-50603 | BUSHING | 10001- | |
| 4B | TG92849-50603 | NUT | 10001- | |
| 4C | TG92483-50603 | WASHER | 10001- | |
| 5 | 20Y-57-21160 | ARM REST,R.H. | 10001- | |
| 6 | 20Y-57-21170 | ROPE,WIRE¤ L.H. | 10001- | |
| 6A | TG92115-40011 | BOLT | 10001- | |
| 7 | 20Y-57-21180 | ROPE,WIRE¤ R.H. | 10001- | |
| 8 | 20Y-57-21210 | COVER | 10001- | |
| 9 | 20Y-57-21220 | LIFTER | 10001- | |
| 10 | 20Y-57-21230 | SEAT ADJUSTER ASS'Y | 10001- | |
| 11 | 20Y-57-21240 | ADJUSTER,R.H. | 10001- | |
| 12 | 20Y-57-21250 | ADJUSTER,L.H. | 10001- | |
| 13 | 20Y-57-21430 | CLIP | 10001- | |
| 14 | 01580-10806 | NUT | 10001- | |
| 15 | 01643-30823 | WASHER | 10001- |