The Mitsubishi S12R engine line groups 13 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 04343-35500 | Alternator (Initial exciting type, brush-less) | alternator |
| 04343-35600 | Alternator (Initial exciting type, brush-less) | alternator |
| 04343-38000 | Alternator (Self exciting type, with brush) | alternator |
| 04343-38300 | Alternator (External exciting type, with brush) | belt |
| 32591-09100 | Belt gauge | belt |
| 37591-06100 | Fuel injection pump coupling gauge | fuel_pump |
| 37594-01300 | ThreeBond 1211 liquid gasket | gasket |
| 37591-03200 | Impeller remover | impeller |
| 33591-10101 | nozzle remover | injector |
| 37560-22010 | Fuel injection nozzle (T type) | injector |
| 37560-35000 | Fuel injection nozzle (T type) | injector |
| 37560-37000 | Fuel injection nozzle (T type) | injector |
| 37560-39000 | Fuel injection nozzle (T type) | injector |
| 37860-06000 | Fuel injection nozzle (TE type) | injector |
| 83091-03301 | Nozzle tester | injector |
| 05930-00200 | Eyebolt (M12 × 1.25 mm) | other_service |
| 30091-07500 | Valve lapper | other_service |
| 30091-08800 | valve lapper | other_service |
| 32591-02500 | Idler bushing puller | other_service |
| 32591-04200 | valve seat puller | other_service |
| 33591-04300 | valve guide remover | other_service |
| 33591-04500 | Valve spring pusher | other_service |
| 33A91-01700 | Compression gauge | other_service |
| 37191-03200 | piston ring tool | other_service |
| 37191-07100 | Piston installer | other_service |
| 37320-22600 | Crankshaft pulley | other_service |
| 37420-22500 | Crankshaft pulley | other_service |
| 37491-02100 | Slinger installer | other_service |
| 37491-02200 | Installer guide | other_service |
| 37504-10400 | Single valve spring | other_service |
| 37504-10600 | Inner spring | other_service |
| 37504-20500 | Outer spring | other_service |
| 37507-22700 | Cylinder liner (High power) | other_service |
| 37507-82600 | Cylinder liner (Standard) | other_service |
| 37517-00800 | Piston | other_service |
| 37517-00900 | Piston (Overlap 108°, Compression ratio 14.5) | other_service |
| 37517-07700 | Piston (Overlap 108°, Compression ratio 14) | other_service |
| 37517-07800 | Piston | other_service |
| 37517-07900 | Piston | other_service |
| 37517-10401 | Piston (Overlap 108°, Compression ratio 15) | other_service |
| 37517-10600 | Piston (Overlap 93°, Compression ratio 13.5) | other_service |
| 37517-30101 | Piston (Overlap 60°, Compression ratio 14) | other_service |
| 37519-11400 | Connecting rod bolt (Lower/long) | other_service |
| 37519-20301 | Connecting rod bolt (No differentiation) | other_service |
| 37519-21300 | Connecting rod bolt (Upper/short) | other_service |
| 37591-01010 | Connecting rod bushing installer | other_service |
| 37591-02200 | adaptor | other_service |
| 37591-02400 | eye nut | other_service |
| 37591-02500 | Eyebolt (M10 × 1.25 mm) | other_service |
| 37591-02600 | rocker bushing tool | other_service |
| 37591-04010 | Valve seat installer | other_service |
| 37591-04100 | Cylinder liner remover | other_service |
| 37591-06200 | liner pusher | other_service |
| 37591-06300 | bolts | other_service |
| 37591-06400 | valve seat cutter | other_service |
| 37591-06430 | valve seat cutter | other_service |
| 37591-07010 | Crankcase grinder | other_service |
| 37598-08900 | Head bolt plate | other_service |
| 37598-09100 | head bolt spacers | other_service |
| 37598-09201 | projection plate O | other_service |
| 37705-10300 | Camshaft (Right, Overlap 93°) | other_service |
| 37705-10400 | Camshaft (Left, Overlap 93°) | other_service |
| 37705-20100 | Camshaft (Right, Overlap 61°) | other_service |
| 37705-20200 | Camshaft (Left, Overlap 61°) | other_service |
| 37713-12502 | Oil pan (Deep) | other_service |
| 37713-40101 | Oil pan (Shallow) | other_service |
| 37719-32020 | Connecting rod | other_service |
| 37719-60040 | Connecting rod | other_service |
| 37719-60050 | Connecting rod | other_service |
| 37720-03601 | Crankshaft pulley | other_service |
| 37720-13500 | Crankshaft pulley | other_service |
| 37720-20100 | Crankshaft (NV Classification) | other_service |
| 37720-20190 | Crankshaft (Standard) | other_service |
| 37725-14301 | Stub shaft | other_service |
| 37747-11100 | Air cooler (Air to air type) | other_service |
| 37748-03601 | Fan (D1524, PUSHER) | other_service |
| 37755-11001 | Air cooler (Fresh water) | other_service |
| 37755-12010 | Air cooler (Seawater) | other_service |
| 37755-14001 | Air cooler (Fresh water, external cooling) | other_service |
| 37755-25000 | Air cooler (Fresh water two stages) | other_service |
| 37791-01500 | Connecting rod gauge | other_service |
| 37791-01600 | Connecting rod gauge | other_service |
| 37791-02100 | Eyebolt | other_service |
| 37791-02200 | Jack bolt | other_service |
| 37791-02500 | Rear idler bushing installer | other_service |
| 37791-03300 | Ring installer | other_service |
| 37791-03400 | Ring remover | other_service |
| 37791-08101 | Exhaust manifold A wrench | other_service |
| 37791-08201 | Exhaust manifold B wrench | other_service |
| 43291-00301 | Plunger holder (special tool) | other_service |
| 45191-08400 | ring pliers | other_service |
| 45325-91801 | Crankshaft pulley | other_service |
| 45346-98102 | Expansion tank | other_service |
| 45815-32301 | Eyebolt | other_service |
| 45B91-02100 | Sealing installer | other_service |
| 45R52-30001 | Heat exchanger | other_service |
| 45R52-31000 | Heat exchanger | other_service |
| 46648-06400 | Fan (D1828, PUSHER) | other_service |
| 48202-09301 | Sleeve installer | other_service |
| 48202-14100 | Shim (thickness: 0.5 mm [0.0197 in.]) | other_service |
| 48202-14200 | Shim (thickness: 0.6 mm [0.0236 in.]) | other_service |
| 48291-00200 | Plunger spring compression jig | other_service |
| 48291-00301 | Plunger holder | other_service |
| 48291-00400 | Cam thrust ejector | other_service |
| 49160-90101 | snap ring pliers | other_service |
| 49160-90110 | snap ring pliers | other_service |
| 58309-73100 | Socket | other_service |
| 64362-68500 | Jack bolt (M12×1.25 mm) | other_service |
| MM321420 | piston remover | other_service |
| 37591-03100 | Water pump pliers | pump |
| 37753-00013 | Water pump for air cooler | pump |
| 37753-00031 | Water pump for air cooler | pump |
| 45353-94600 | Seawater pump for air cooler | pump |
| 48291-00100 | Pump assembly stand | pump |
| 37191-01500 | valve guide seal installer | seal |
| 37191-06300 | Unit seal installer | seal |
| 37191-11500 | Guide and seal installer | seal |
| 37591-05010 | Front seal installer assembly | seal |
| 37591-12300 | Guide and seal installer | seal |
| 37791-06010 | Rear seal installer assembly | seal |
| 37507-12500 | shim, thickness: 0.10 mm [0.0039 in.] | shim |
| 37507-12510 | shim, thickness: 0.05 mm [0.0020 in.] | shim |
| 37507-12520 | shim, thickness: 0.15 mm [0.0059 in.] | shim |
| 04065-52001 | Starter (Air motor) | starter |
| 37766-20200 | Starter (Single wire type) | starter |
| 37766-30300 | Starter (Marine use self starter motor) | starter |
| 48202-14300 | tappet | tappet |
| 48202-14400 | tappet | tappet |
| 37546-21700 | Thermostat (For jacket water) | thermostat |
| 37751-01700 | Thermostat (For air cooler) | thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Leads compiled from supplier catalogs across the family’s variants; verify the exact part for your variant and serial number.