This is a new, genuine Kubota thermostat assembly, part number 19434-73015. It starts to open at 71°C (160°F). It fits Kubota D902, D905, D1105, V1505 and V2203 diesel engines. Kubota lists it on machines such as the BX1500D and BX2230D, L2600DT and M5700 tractors, U15 and U17 mini excavators, KX41-3 and KX91-3 excavators, and R420S and R520S wheel loaders. It replaces 19434-73010, 19434-73013 and 19434-73014.
Replace it if the engine is slow to warm up or runs hot, and any time the water pump is replaced. The thermostat gasket, Kubota 16221-73270, is a separate part number.
Confirm Fitment Before You Order
Kubota uses several different thermostats across its engine lines. Match the number in your parts list, or send the engine model and serial number, and we will confirm the match. Call 530-668-0818 and we will confirm the exact match at no charge before anything ships.
Specifications
| Part number | 19434-73015 |
| Brand | Kubota |
| Condition | New, genuine, in original packaging |
| Type | Coolant thermostat assembly |
| Opening temperature | 71°C (160°F) |
| Replaces | 19434-73010, 19434-73013, 19434-73014 |
| Gasket | Kubota 16221-73270, sold separately |
| Engines | Kubota D902, D905, D1105, V1505, V2203 |
| Price | $29.00 |
| Shipping weight | 1 lb |
Fits / Applications
- Kubota D902, D905 and D1105 diesel engines
- Kubota V1505 and V2203 diesel engines
- Kubota BX1500D and BX2230D tractors
- Kubota L2600DT and M5700 tractors
- Kubota U15 and U17 mini excavators
- Kubota KX41-3 and KX91-3 excavators
- Kubota R420S and R520S wheel loaders
Use a new thermostat gasket (Kubota 16221-73270) and clean both housing faces. Refill and bleed the cooling system, then confirm the engine reaches normal temperature.
Part Numbers & Cross Reference
Kubota (replaced number) 19434-73014 · Kubota (replaced number) 19434-73013 · Kubota (replaced number) 19434-73010
Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.
Why Buy From Valley Fuel Injection
We are an authorized Kubota dealer and a diesel fuel-injection shop in Woodland, CA, working on diesel engines since 1993. When you call, you talk to people who know Kubota engines, and we check the part number against your engine serial or machine model before anything ships, so the right part arrives the first time. See our Kubota engine sales, parts and service.
Ships UPS Ground anywhere in the lower 48. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax is additional; shipping is calculated at checkout. Buying tax-exempt? Qualifying diesel repair shops, fleets, farms, and agricultural operations can purchase tax-free. Set up tax-exempt purchasing once and every qualifying order is tax-free going forward.





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