The Caterpillar C9 ACERT engine line groups 2 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| P03-511-000 | Air Filter | air_filter |
| P03-521-000 | Air Filter | air_filter |
| P03-532-000 | Air Filter | air_filter |
| P04-511-000 | Battery | battery |
| P04-521-000 | Battery | battery |
| P04-532-000 | Battery | battery |
| P02-511-000 | Fuel Filter | fuel_filter |
| P02-521-000 | Fuel Filter | fuel_filter |
| P02-532-000 | Fuel Filter | fuel_filter |
| P01-511-000 | Oil Filter | oil_filter |
| P01-521-000 | Oil Filter | oil_filter |
| P01-532-000 | Oil Filter | oil_filter |
| AEHQ5727-01 | Not explicitly stated in the document. | other_service |
| AEHQ7040 | 24V DC, Two 12V batteries, Halogen cab and boom lights, Engine and hydraulic compartments service lights, Sealed wiring enclosures | other_service |
| 6128953 | Cat Work Tools trash grapple | trash_grapple |
| 6128954 | Cat Work Tools trash grapple bracket | trash_grapple_bracket |
| P01-521-001 | Undercarriage | undercarriage |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.