The COGENG 4432040 Oil Pressure Sensor is a high-precision, direct OEM replacement designed specifically for Hitachi EX120-5 and EX200-5 excavators equipped with the 4HK1 engine. This essential component continuously monitors engine oil pressure and transmits accurate real-time signals to the ECU, ensuring proper engine lubrication and protecting your valuable equipment from costly damage due to low oil pressure.
Built for the demanding conditions of construction and excavation sites – including constant vibration, extreme temperature fluctuations, and exposure to oil, dust, and debris – this sensor features a rugged iron housing and premium rubber seals that deliver leak-proof performance and exceptional durability. Each unit is manufactured under ISO9001 certified processes and undergoes 100% testing for accuracy, sealing integrity, and response time before leaving the factory.
| Parameter | Details |
|---|---|
| Product Name | Oil Pressure Sensor |
| Part Number | 4432040 |
| Compatible Brands | Hitachi |
| Compatible Excavator Models | EX120-5, EX200-5 |
| Compatible Engine | 4HK1 |
| Material | Iron + Rubber |
| Packing | PP bag inside, carton box outside |
| Payment Terms | Western Union, L/C, T/T, MoneyGram, D/A, D/P |
| MOQ | Acceptable trial order (1 piece accepted) |
| Shipping Mode | By air, by sea, by express (FedEx, UPS, DHL, TNT, etc.) |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Stock Status | ✅ In Stock |
| Supply Capacity | 500 PCS |
Why Choose COGENG 4432040?
| Feature | Benefit |
|---|---|
| ✅ Direct OEM Replacement | No modifications, no adapters – bolt it on and go |
| ✅ High Accuracy | ±2% pressure reading tolerance for reliable ECU data |
| ✅ Durable Iron Construction | Withstands impact, corrosion, and vibration |
| ✅ Leak-Proof Design | Premium rubber O-ring pre-installed |
| ✅ In Stock | Ready to ship immediately – no waiting |
| ✅ Affordable | OEM quality at aftermarket prices |
| ✅ ISO9001 Certified | Consistent quality you can trust |
| Component Name | Quantity | Description |
|---|---|---|
| Oil Pressure Sensor | 1 | Complete assembly, ready to install |
| Rubber O-ring / Sealing Ring | 1 | Pre-installed on threaded base |
| Protective Plastic Cap | 1 | For shipping protection only (remove before installation) |
| Installation Quick Guide | 1 | Basic instructions |
✅ Direct OEM Replacement For:
Hitachi OEM part number: 4432040
Also compatible with: 4332040,4432041, 4432042 (check connector style)
✅ Engine Compatibility:
Hitachi 4HK1 (4-cylinder, turbocharged diesel)
Used in EX120-5 and EX200-5 models
✅ Electrical Specifications:
Compatible with 12V and 24V systems (auto-sensing)
Output signal matches Hitachi ECU requirements
✅ Mechanical Specifications:
Thread size: 1/8-27 NPT (standard)
Hex size: 22mm or 24mm (confirm with old sensor)
Overall length: Approx. 65mm
⚠️ Before Purchasing, Please Verify:
Your excavator model is EX120-5 or EX200-5
Your engine is 4HK1 (not 4BD1, 6BD1, or other)
Your old sensor part number (photo recommended)
Connector type – 2-pin Deutsch is standard for 4432040
❌ NOT Compatible With:
Hitachi EX120-3, EX200-3 (Isuzu 4BD1/6BD1 engines)
Hitachi EX120-6, EX200-6 (different ECU and harness)
Any machine without the 4HK1 engine
Marine, generator, or industrial 4HK1 applications (different calibration)
Installation decomposition diagram
Tools Required:
| Tool | Purpose |
|---|---|
| 22mm or 24mm deep socket / wrench | Remove and install sensor |
| Torque wrench (optional but recommended) | Achieve 15–20 Nm spec |
| Clean rag | Wipe mounting surface |
| Flashlight | Locate sensor in engine bay |
No thread sealant or PTFE tape is required – the rubber O-ring provides a complete seal.
Installation Tips:
⚠️ Engine must be cool – hot oil can cause severe burns
Do NOT overtighten – iron housing can crack at >30 Nm
Never use PTFE tape – it can shred and clog oil passages
Wipe the mounting surface clean before installing new sensor
After installation, idle engine for 2 minutes and inspect for leaks
If oil warning light stays on, recheck connector seating
| Order Option | Details |
|---|---|
| Minimum Order Quantity (MOQ) | 1 piece (trial order accepted) |
| Stock Status | ✅ 500+ pieces in stock |
| Lead Time | Ships within 24–48 hours of order confirmation |
| Payment Methods | Western Union, L/C, T/T, MoneyGram, D/A, D/P |
| Shipping Methods | FedEx, UPS, DHL, TNT, air freight, sea freight |
| Packaging | PP bag inside, carton box outside |
How to Order in 3 Simple Steps:
| Step | Action |
|---|---|
| 1️⃣ | Send inquiry with your excavator model (EX120-5 or EX200-5) |
| 2️⃣ | Confirm your engine is 4HK1 (photo of old sensor optional) |
| 3️⃣ | Place order – we send invoice + tracking number within 24 hours |
*Shipping Details Delivery Return*
Sales Price:
The displayed price is for reference only. Please contact COGENG sales support for the exact price.
Shipping Method:
Sea, land, or air transport; the specific method is determined based on the nature of the shipment.
Estimated Delivery Time:
Based on the dispatch time from the logistics carrier; the displayed arrival time serves as the reference.
Contact information is provided at the bottom of the page.
Merchant Return Policy:
Products shipped are not eligible for return or exchange.
Q1: What are the symptoms of a failing oil pressure sensor on a Hitachi excavator?
A: Common signs include:
Oil pressure warning light stays on or flashes (even when oil level is correct)
Oil pressure gauge reads zero or maximum constantly
Intermittent warning light, especially when engine is hot
Engine derates or goes into "limp mode"
No oil pressure reading on dashboard display
False error codes related to oil pressure circuit
Q2: Is this a genuine Hitachi OEM part?
A: No. This is a COGENG aftermarket replacement manufactured to meet or exceed OEM specifications. It is a direct replacement for Hitachi part number 4432040.
Q3: What is the difference between 4432040 and 4332040?
A: The main difference is typically the connector type and slight variation in calibration. The 4432040 is the correct version for most EX120-5 and EX200-5 models with the 4HK1 engine. Always verify with your old part number.
Q4: Will this sensor fit my EX120-5 with 4HK1 engine?
A: Yes – this sensor is specifically designed and tested for that exact machine and engine combination.
Q5: Is this sensor in stock for immediate shipping?
A: Yes – COGENG maintains stock of 500+ units. Orders ship within 24–48 hours.
Q6: What is the warranty?
A: COGENG provides a 6-month warranty against manufacturing defects. Warranty does not cover damage from improper installation, physical impact, or environmental contamination.
Q7: How long does shipping take?
A:
Express (DHL/FedEx/UPS/TNT): 3–7 business days worldwide
Air freight: 7–12 days
Sea freight: 20–40 days
Q8: Do I need any adapters or special tools to install this sensor?
A: No. It is a direct fit. A standard 22mm or 24mm wrench is all you need.
Q9: Can I install this sensor myself, or do I need a mechanic?
A: With basic mechanical skills, you can install it yourself in about 15–20 minutes. However, if you are uncomfortable working around the engine, professional installation is recommended.
Q10: How do I place a trial order?
A: Contact your COGENG distributor directly. MOQ is 1 piece for trial orders – we welcome first-time buyers.
Q11: Does this sensor work with both 12V and 24V systems?
A: Yes, the COGENG 4432040 auto-senses system voltage and is compatible with both 12V and 24V Hitachi excavator electrical systems.
Q12: What is the pressure range of this sensor?
A: The sensor measures from 0–150 PSI (0–10 bar), covering the full operating range of the 4HK1 engine.
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