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Aftermarket replacement water pump for Mitsubishi S4S and S4S-DT engines. It replaces Mitsubishi part number 32A45-00040: the water pump listed by Mitsubishi as part number 32A45-00040.
Fits Mitsubishi S4S and S4S-DT engines. It is built to the same mounting, wiring and connector layout as the part it replaces, so it fits in place of the old one without changes to the machine.
Check the part number on the label of the old unit, or in the parts manual for your machine's serial number range, before ordering. Sold as a single unit, shipped worldwide.
| Part Type | Water Pump |
| Replaces | Mitsubishi 32A45-00040 |
| Fits | Mitsubishi S4S and S4S-DT engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 841330 |
Mitsubishi machines and engines
Check the part number on your old unit before ordering.
| Pack | Mitsubishi Part No.(SPM Part No.) | Fits |
|---|---|---|
| 1 Piece | 32A45-00040(SPM-HEP-2557) | Mitsubishi S4S and S4S-DT engines |
Coolant leak from the weep hole
Coolant dripping from the pump body means the seal has failed. Replace the pump before the engine runs low and overheats.
Overheating
A worn impeller moves less coolant. If the engine runs hot with a good thermostat and radiator, check the pump.
Bearing noise or play
A rumble or play at the pulley means the bearing is worn and the seal will follow.
Service at the same time
Change the thermostat, belts and coolant while the pump is off.
Found this part cheaper elsewhere? Send us the listing and we will beat it under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Our price of USD 71.20 is 20 to 24% less than the aftermarket prices we compared it with:
| Holdwell, aftermarket | USD 89.00 (checked 5 Oct 2026) |
| eBay, aftermarket seller | USD 92.02 (checked 5 Oct 2026) |
| eBay, aftermarket seller | USD 94.06 (checked 5 Oct 2026) |
No. It is an aftermarket part made to fit in place of Mitsubishi 32A45-00040. It is not made by or affiliated with Mitsubishi; the Mitsubishi part number is used only to show what it replaces.
It fits Mitsubishi S4S and S4S-DT engines. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It is made to the same mounting and connections as the original part. Fit new gaskets and seals where they are used, and check for leaks and correct operation before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
