| Item | Part No. | Part Name | Qty | Serial No. |
| 6545-01-0010 | SCR Assembly | 21857401- | ||
| 1 | 6545-01-0110 | SCR Assembly | 21857401- | |
| 2 | 600-816-2720 | Sensor, Temperature | 21857401- | |
| 3 | 01010-80616 | Bolt | 21857401- | |
| 4 | 01643-30623 | Washer | 21857401- | |
| 5 | 600-816-2530 | Sensor, Temperature | 21857401- | |
| 6 | 01010-80630 | Bolt | 21857401- | |
| 7 | 01643-30623 | Washer | 21857401- | |
| 8 | 01010-80650 | Bolt | 21857401- | |
| 9 | 01643-30623 | Washer | 21857401- | |
| 10 | 600-816-2811 | Module | 21857401- | |
| 11 | 600-816-2830 | Sensor, Ammonia | 21857401- | |
| 12 | 01010-80625 | Bolt | 21857401- | |
| 13 | 01643-30623 | Washer | 21857401- | |
| 14 | 6544-81-1130 | Bracket | 21857401- | |
| 15 | 6544-91-1220 | Band | 21857401- | |
| 16 | 6544-91-1010 | Spacer | 21857401- | |
| 17 | 01584-00605 | Nut | 21857401- | |
| 18 | 6544-81-1110 | Bracket | 21857401- | |
| 19 | 6526-91-1060 | Spacer | 21857401- | |
| 20 | 6544-81-1030 | Bracket | 21857401- | |
| 21 | 6545-81-1020 | Bracket | 21857401- | |
| 22 | 01010-80616 | Bolt | 21857401- | |
| 23 | 01643-30623 | Washer | 21857401- | |
| 24 | 6544-91-1230 | Clip | 21857401- | |
| 25 | 01010-80616 | Bolt | 21857401- | |
| 26 | 01643-30623 | Washer | 21857401- | |
| 27 | 6253-81-4410 | Clip | 21857401- | |
| 28 | 01435-01016 | Bolt | 21857401- | |
| 29 | 6544-91-1240 | Clip | 21857401- | |
| 30 | 01010-80616 | Bolt | 21857401- | |
| 31 | 01643-30623 | Washer | 21857401- | |
| 32 | 6530-91-1010 | Clip | 21857401- | |
| 33 | 01435-01030 | Bolt | 21857401- | |
| 34 | 6544-91-1250 | Clip | 21857401- | |
| 35 | 01010-80616 | Bolt | 21857401- | |
| 36 | 01643-30623 | Washer | 21857401- | |
| 37 | 6544-91-1260 | Clip | 21857401- | |
| 38 | 08057-14010 | Clip | 21857401- | |
| 39 | 01435-01016 | Bolt | 21857401- | |
| 40 | 6534-91-1120 | Clamp | 21857401- | |
| 41 | 6534-91-1130 | Gasket | 21857401- |