The MTU 12V engine line groups 3 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| W1005 | Air filter | Air filter |
| 12V4000Gx3-07 | Battery | Battery |
| 12V4000Gx3-06 | Belt | Belt |
| W1241 | Drive belts | Belt drive |
| W1009 | Centrifugal oil filter (if fitted) | Centrifugal oil filter |
| W1011 | Combustion chambers | Combustion chambers |
| W2000 | Before starting maintenance work, drain the coolant and flush the cooling systems. | Component maintenance |
| W2001 | Inspect rocker arms and valve bridge for wear. Insert an endoscope through the pushrod bore to visually inspect swing followers and camshaft running surfaces. | Component maintenance |
| W2002 | Clean air ducting. | Component maintenance |
| W2003 | Clean intercoolers and inspect for leakage. | Component maintenance |
| W2004 | Fit new high-pressure sensor in fuel system. | Component maintenance |
| W2006 | Check charge air coolant thermostat and replace thermal actuator (→Workshop Manual) | Component maintenance |
| W2007 | Check centrifugal oil filter for wear (if fitted) (→Workshop Manual) | Component maintenance |
| W2009 | Inspect centrifugal oil filter for wear (if fitted). | Component maintenance |
| W2010 | Overhaul starter. | Component maintenance |
| W2011 | Inspect vibration damper. | Component maintenance |
| W2062 | Crankcase breather: Replace oil separator (→Workshop Manual) | Component maintenance |
| W2070 | Overhaul charge air coolant pump. | Component maintenance |
| W2110 | Overhaul engine coolant pump | Component maintenance |
| W1063 | Overhaul cylinder heads. Visually inspect piston crowns and wear pattern on cylinder liner running surfaces. | Conrod bearing |
| W1046 | Crankcase breathers | Crankcase breathers |
| W3000 | Completely disassemble the engine. Inspect engine components as per Maintenance Manual instructions and repair or fit new components as required. | Extended component maintenance |
| W3001 | Exchange all elastomeric parts and seals for new ones. | Extended component maintenance |
| W3002 | Fit new piston rings. | Extended component maintenance |
| W3003 | Fit new conrod bearings. | Extended component maintenance |
| W3004 | Fit new crankshaft bearings. | Extended component maintenance |
| W3005 | Fit new cylinder liners. | Extended component maintenance |
| W3006 | Fit new antifriction bearings for auxiliary PTOs. | Extended component maintenance |
| W3007 | Fit new high-pressure fuel pump. | Extended component maintenance |
| W3010 | Overhaul battery-charging generator. | Extended component maintenance |
| 07500211a | Screw, Adapter (3) | Fastener |
| 08300126a | Easy-change filter | Filter |
| 12V4000Gx3-02 | Engine oil filter | Filter |
| 12V4000Gx3-03 | Fuel filter | Filter |
| 12V4000Gx3-04 | Air filter | Filter |
| 12V4000Gx3-01 | Engine oil | Fluid |
| 12V4000Gx3-05 | Coolant | Fluid |
| W1001 | Fuel filter or new fuel filter insert | Fuel filter |
| W1006 | Fuel injectors | Fuel injectors |
| 08300029b | Gasket | Gasket |
| 04000115a | O-ring | O ring |
| W1008 | Engine oil filter | Oil filter |
| 00000705a | Coolant system | Service part / kit |
| 08000139a | Vent plug | Service part / kit |
| F30006212 | Ratchet | Service part / kit |
| F30047446 | Torque wrench, 60-320 Nm | Service part / kit |
| F30510423 | Torque wrench, 10-60 Nm | Service part / kit |
| F6555766 | Barring tool | Service part / kit |
| 1250007 | Rubber sleeve | Rubber sleeve |
| W1250 | Rubber sleeves | Rubber sleeves |
| 01200211a | Sealing ring | Seal |
| 075001552 | Sealing ring | Seal |
| 07500158a | Sealing ring | Seal |
| 07500159 | Sealing ring | Seal |
| 01200209a | Adjustable pointer | Sensor |
| 12V4000Gx3-08 | Spark plug | Spark plug |
| 5605892099/00 | MTU test kit | Special tools |
| F30025896 | Socket wrench, 17 mm | Special tools |
| F30025897 | Socket wrench, 19 mm | Special tools |
| F30027336 | Torque wrench 6-50 Nm | Special tools |
| F30027341 | Ratchet adapter | Special tools |
| F30039526 | Ring socket, 24 mm | Special tools |
| F6789889 | Installation/removal tool for injector | Special tools |
| W1041 | Turbochargers | Turbochargers |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.