0445110255 Fuel Injector – Bosch-Compatible Common Rail Injector for D4FB, D4FB-L & D3FA Diesel Engines
For precise fuel atomization and reliable cold starts in Hyundai‑Kia‘s 1.6L CRDi diesel engines, the 0445110255 common rail injector (Bosch compatible) is the direct replacement you need. Designed specifically for the D4FB, D4FB‑L, and D3FA engine families, this injector restores original injection timing, reduces diesel knock, and helps maintain Euro 4/5 emission compliance. Below we explore its structural benefits, application list, typical failure signs, installation best practices, and why Rsolid engine parts is your trusted global supplier.
1. Structural Advantages of the 0445110255 Injector
The 0445110255 follows Bosch’s proven CRI2‑18 solenoid injector architecture, offering several performance and durability advantages:
Fast‑switching magnetic solenoid – Achieves opening times below 0.2 ms at 1,600 bar, enabling up to 5 injection events per cycle (pilot, pre, main, after, post). This reduces combustion noise and NOx formation.
Hardened stainless steel body – Withstands the high pressures (up to 1,800 bar) and thermal cycling common in small‑displacement turbo diesel engines, preventing body distortion over time.
6‑hole micro‑sac nozzle – Laser‑drilled orifices produce an extremely fine fuel spray, improving air‑fuel mixing in the D4FB’s swirl combustion chamber. The reduced sac volume cuts hydrocarbon emissions during idle.
Balanced hydraulic servo system – Minimises internal leakage and ensures consistent injection quantity cylinder‑to‑cylinder, which is critical for smooth idle on 4‑cylinder engines.
Plug‑and‑play connector – Matches OEM resistance (typically 0.23–0.27 Ω) and pin assignment, allowing direct connection to the ECU without adapters.
These features translate into quieter operation, lower DPF soot loading, and better fuel economy across the engine’s service life.
2. Compatible Engine & Vehicle Models (D4FB, D4FB‑L, D3FA)
The 0445110255 injector is engineered for Hyundai‑Kia 1.6L CRDi diesel engines – specifically the D4FB series and related D4FB‑L (low power variant) and D3FA (some markets). Verified applications include:
| Engine Code | Displacement | Fuel System Pressure | Typical Vehicles |
|---|
| D4FB | 1.6L (1582 cc) | Bosch CP3 (1,600 bar) | Hyundai i20, i30, ix20, Veloster; Kia Cee‘d, Soul, Venga |
| D4FB‑L | 1.6L (1582 cc) | Bosch CP3 (1,600 bar) | Lower output versions (75 kW / 102 hp) – same injector |
| D3FA | 1.6L (1582 cc) | Bosch CP3 (1,600 bar) | Certain 2012–2015 Hyundai i30 / Kia Cee’d (Euro 5) |
Detailed vehicle list (by model and year):
| Make | Model | Years | Engine Code | Notes |
|---|
| Hyundai | i20 (GB) | 2012–2018 | D4FB | 1.6 CRDi 94–126 hp |
| Hyundai | i30 (FD / GD) | 2007–2015 | D4FB | 1.6 CRDi 113–126 hp |
| Hyundai | ix20 (JC) | 2010–2018 | D4FB | 1.6 CRDi |
| Hyundai | Veloster (FS) | 2011–2017 | D4FB | 1.6 CRDi |
| Kia | Cee‘d (JD / CD) | 2012–2018 | D4FB / D3FA | 1.6 CRDi 110–134 hp |
| Kia | Soul (PS) | 2009–2019 | D4FB | 1.6 CRDi |
| Kia | Venga (YN) | 2010–2019 | D4FB | 1.6 CRDi |
| Kia | Rio (UB) | 2011–2017 | D4FB | 1.6 CRDi (select markets) |
Note: Always verify your original injector part number – look for 0445110255 or OEM numbers 33800-2A700, 33800-2A710, 33800-2A720. D3FA engines may also use 0445110249 – check fitment carefully.
3. Common Failure Symptoms & Installation Replacement Advice
The D4FB engine is sensitive to injector wear due to its high‑pressure common rail system. Recognize these early failure signs to avoid DPF or EGR damage.
Typical failure symptoms of a failing 0445110255 injector:
Rough idle, especially when warm – Cylinder balance values > ±2.0 mg/stroke (visible on diagnostic tool). The engine may shake at traffic lights.
Excessive black smoke under acceleration – Over‑fueling caused by a worn needle or stuck solenoid.
White smoke on cold start – Poor atomisation from a clogged or worn nozzle tip.
Hard starting or long cranking – Rail pressure cannot build due to internal leakage (return flow > 30 ml/min at idle).
Increased fuel consumption – Return fuel volume high; fuel is pumped but not injected properly.
Engine oil dilution – Diesel fuel mixing with oil (dangerous – rising oil level, strong diesel smell). Immediate attention required.
Frequent DPF regeneration – Excess soot from bad injectors blocks the diesel particulate filter (DPF) rapidly.
P0201–P0204 injector circuit codes – Solenoid coil electrical failure (intermittent open or short).
Installation & replacement best practices for D4FB / D4FB‑L / D3FA engines:
Always replace all sealing components – New copper sealing washer, upper and lower O‑rings (use Bosch seal kit 2 418 227 053 or equivalent). Never reuse old seals.
Clean the injector bore thoroughly – Use a 14mm injector seat reamer to remove carbon deposits from the cylinder head. Even a tiny carbon ridge will cause combustion gas blow‑by.
Lubricate new O‑rings with clean diesel fuel – Never use grease or engine oil, which can block the fine nozzle passages.
Torque injector hold‑down clamp precisely – For D4FB engines: typical 25 Nm + 90° (use a new clamp bolt each time). Over‑torquing distorts the injector body; under‑torquing causes leakage.
Replace fuel filter – Contaminated fuel is the #1 cause of new injector failure. Install a genuine or OEM‑spec fuel filter (Hyundai 31912-2A000).
Prime the fuel system – Operate the manual primer (if equipped) or use a scan tool to run the in‑tank lift pump for 30 seconds to purge air.
Code the injector using a diagnostic tool – The 0445110255 has a 10‑character IMA (Injector Matching Adjustment) code on its top label. Using VCDS, GDS (Hyundai), KDS (Kia), or a generic scanner (Launch, Autel), enter the code into the ECU. Without coding, the engine may misfire or trigger DTCs.
Perform leak‑off test after installation – Run engine at idle for 2 minutes, then measure return fuel from each injector (using graduated cylinders). All should be below 20 ml/min and within 5 ml/min of each other.
Reset adaptation values – After coding, perform “Injector Quantity Adaptation” and “Fuel Pressure Adaptation” via diagnostic software.
4. Why Choose Rsolid Engine Parts as Your Supplier?
At Rsolid engine parts, we specialise in high‑quality diesel fuel injection components. Here‘s why thousands of workshops and fleet owners trust us:
100% test‑bench verified – Every 0445110255 injector is calibrated on a professional common rail test bench (up to 2,000 bar) with flow balance guaranteed within ±2%.
Bosch‑compatible, OE fitment – Direct replacement for Hyundai 33800-2A700 and Kia equivalents; matches all dimensions, solenoid resistance, and spray angles.
New build, not remanufactured – All units are newly manufactured to Bosch specifications, not reconditioned or repaired.
Competitive wholesale pricing – Ideal for volume buyers, repair shops, and individual owners.
Fast global shipping – Stock available from our warehouses in Asia, Europe, and North America.
Expert technical support – Our team helps with IMA coding, torque specifications, and troubleshooting for D4FB engines.
12‑month warranty – Against manufacturing defects and premature wear.
📧 Contact us for a quote or technical assistance:
✉️ Email: amy@rinjector.com
🌐 Website: www.rinjector.com
