Looking for a reliable Hitachi 4257129 (also searched as 4257129) cooling system component? This premium water temperature sensor is engineered to provide precise thermal monitoring for your heavy machinery, ensuring your engine operates within safe parameters even under extreme workloads.
As a leading heavy equipment parts supplier, we offer the 4257129 Replacement that meets or exceeds OEM standards. Whether you are performing a routine maintenance check or a complete engine overhaul, this sensor is the critical link to preventing engine overheating in your Hitachi fleet.
| Attribute | Details |
|---|---|
| Model NO. | Hitachi EX120-2, EX120-3, EX120-5, EX200-2, EX200-3, EX200-5 |
| Product Name | Water Temperature Sensor / Coolant Temp Sender |
| Part Number | 4257129 (Alternate: 4257129) |
| Condition | Brand New, OEM Standard Replacement |
| Type | Thermistors Sensor Type |
| Application | Engine cooling system maintenance, sensor failure replacement |
| Stock Status | In Stock / Fast Dispatch Available |
| MOQ | 1 Piece |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | DHL, Fedex, EMS, UPS, Air/Sea Freight |
Purchasing the right sensor is about protecting your engine investment. Below is a comparison of our OEM-standard parts versus standard aftermarket market sensors.
| Core Purchasing Factors | Our 4257129 Replacement | Generic Market Sensors |
|---|---|---|
| Accuracy Range | High Precision (+/- 1 Degree) | Low Precision (Frequent Errors) |
| Material Quality | OEM-standard Tri-metal Structure | Basic Plastic or Single Metal |
| Connector Fit | Plug-and-Play for EX200 Series | Loose Fit (Signal Interruption) |
| Service Life | Extended Durability for Mining | Short Life (Rapid Corrosion) |
| Thermal Response | Instant Feedback to ECU | Delayed Response (Overheating Risk) |
| Cost Efficiency | Highest ROI for Fleet Operators | Frequent Downtime Costs |
Not sure how this issue affects your equipment?
Our team helps operators across the globe manage their machine health effectively:
Identify potential risks during maintenance of the cooling circuit.
Recommend suitable replacement parts if needed based on serial numbers.
Support both inspection advice and parts supply for global construction projects.
Choosing a 4257129 Replacement that is trusted by repair shops & equipment fleets is the first step to operational success.
This is often caused by a failing 4257129 sensor or corroded wiring. If the resistance in the sensor does not change with temperature, the ECU receives incorrect data, leading to engine de-rating or false alarms. Replacing the sensor with an OEM-standard unit usually resolves this.
The 4257129 is primarily designed for Hitachi excavators using Isuzu engines. Always verify your engine serial number before installation to ensure the thread pitch and voltage range match.
Our units feature an OEM-standard tri-metal structure for superior heat conductivity and are trusted by repair shops & equipment fleets worldwide for their reliability in harsh environments.
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FOLLOW US ON FACEBOOK FOR EXCLUSIVE OFFERSWe specialize in complete engine assemblies and spare parts for world-renowned brands. Our main products include Cylinder Liners, Pistons, Piston Rings, Main Bearings, Con Rod Bearings, Thrust Washers, Overhaul Gasket Kits, Fuel Injection Pumps, Injectors, Crankshafts, Turbochargers, Water Pumps, Oil Pumps, Cylinder Blocks, Cylinder Heads, and Connecting Rods.
Our expertise covers major brands including Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai engines.
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