0445120133 Common Rail Diesel Injector – Compatible with Bosch for Hyundai Excavator Engines
When it comes to maintaining peak performance and fuel efficiency in your Hyundai excavator, the fuel injector plays a critical role. The 0445120133 common rail diesel injector (Bosch compatible) is a precision-engineered replacement part designed to restore original power, reduce emissions, and ensure smooth engine operation. Below we explore its structural advantages, vehicle compatibility, common failure symptoms, installation tips.
1. Structural Advantages of the 0445120133 Injector
This injector follows Bosch’s latest common rail design philosophy, offering several key structural benefits:
Multi-hole precision nozzles – Typically 5–7 laser-drilled orifices that generate an ultra-fine fuel mist for complete combustion, reducing soot and improving throttle response.
Servo-hydraulic amplifier system – Enables very fast needle opening and closing (within microseconds), allowing multiple pilot injections per cycle to lower noise and NOx emissions.
Hardened stainless steel body – Resists corrosion and cavitation caused by high-pressure fuel (up to 2,000 bar), extending service life even in humid or dusty excavator environments.
Balanced valve group design – Reduces internal leakage and maintains consistent injection quantity across all cylinders, preventing uneven wear and “cylinder pulling.”
Integrated pressure sensor (optional variant) – Some versions include a built-in rail pressure sensor for real-time closed-loop control, improving adaptation to varying fuel qualities.
These features make the 0445120133 injector a direct upgrade for older injectors, delivering lower fuel consumption and stable idle.
2. Compatible Hyundai Excavator Models & Engines
This injector is specifically designed for Hyundai excavators equipped with Bosch common rail diesel engines. Below are the confirmed compatible machine and engine codes:
| Excavator Model | Engine Series | Engine Displacement |
|---|
| Hyundai R210-9 | D6GB / D6GA | 6.0L – 6.9L |
| Hyundai R220-9 | D6HB | 6.9L |
| Hyundai R250-9 / R250LC-9 | D6HB | 6.9L |
| Hyundai R275LC-9 | D6HB | 6.9L |
| Hyundai R305LC-9 | D6HB | 6.9L |
| Hyundai R320LC-9 | D6HB | 6.9L |
| Hyundai R380LC-9 | D6HB High Output | 6.9L |
| Hyundai HX210 / HX220 / HX260 | D6GB / D6HB (Stage III / Tier 3) | 6.0L – 6.9L |
*Always verify your original injector part number (0445120133) and engine serial number before ordering. This injector is also cross-compatible with some Doosan and other Bosch CP3 system applications.*
3. Common Failure Symptoms & Installation Replacement Advice
Typical failure signs of a worn or clogged 0445120133 injector:
Rough idle or misfiring – Especially when cold, indicating uneven fuel delivery.
Excessive black smoke – Incomplete combustion due to stuck or worn nozzle.
Increased fuel consumption – Return fuel volume exceeds specification (leaking internally).
Hard starting or long cranking – Rail pressure cannot build sufficiently because of leaky injector.
Engine knock or irregular noise – Pre-ignition caused by dripping nozzle.
High oil level – Fuel dilution of engine oil (very dangerous – check immediately).
Installation & replacement best practices:
Use all new sealing components – Replace copper washers, O-rings, and return line seals. Old seals often cause combustion gas leakage or external fuel leaks.
Clean injector bores thoroughly – Carbon deposits around the nozzle seat can cause improper seating and loss of compression.
Lubricate O-rings with clean diesel or assembly oil – Never use grease or engine oil (may block fine passages).
Torque to factory specification – Typically 70 Nm for hold-down clamp bolts (check your engine manual). Over‑torquing cracks the injector body.
Code the injector (if required) – Some Hyundai Tier 3 engines need IMA (Injector Adjustment Code) programming via diagnostic tool. The 0445120133 has a 6‑digit code on its top – record and input it after installation.
Prime the fuel system – Run the electric lift pump or hand primer for at least 60 seconds before starting to avoid dry firing the new injectors.
Perform leak-off test after installation – A simple return volume check ensures all new injectors are within spec (< 30 ml/min at idle).
4. Why Choose Rsolid Engine Parts as Your Supplier?
At Rsolid engine parts, we understand that downtime on a job site costs money. That’s why we offer:
100% tested, Bosch-compatible injectors – Every unit is calibrated on a common rail test bench (pressure up to 2,200 bar) to ensure flow balance within ±2%.
Direct fitment – No modification required. The 0445120133 matches OEM dimensions and electrical parameters.
Competitive wholesale pricing – Ideal for fleet owners and repair shops.
Fast worldwide shipping – Stock available in multiple warehouses (Asia, EU, NA).
Technical support – Our engineers help you with coding data, troubleshooting, and installation questions.
12-month warranty – Against manufacturing defects and premature wear.
📧 Contact us today for a quote:
✉️ Email: amy@rinjector.com
🌐 Website: www.rinjector.com
