The Hyundai–Kia D4CB 2.5L CRDi diesel engine has powered countless vans, people-movers, SUVs and light commercial vehicles across the globe — from African taxi fleets to Middle Eastern logistics operators. At the heart of its Bosch common rail system sits the 0445010333 injection pump, a CP1 H3 (CR/CP1H3/R70-100) radial-piston high-pressure pump that delivers the consistent fuel pressure needed for smooth performance, fuel economy and reliable cold starts.
Rsolid Engine Parts supplies the 0445010333 as a direct Bosch‑compatible replacement for D4CB engines — 100% calibration tested, sealed in original packaging, and backed by a full 12‑month warranty at competitive pricing.
1. Structural Advantages of the Bosch 0445010333 CP1 H3 Pump
The CP1 is widely regarded as one of the most robust and dependable high‑pressure pump platforms in the diesel industry. The 0445010333 CP1 H3 variant, specifically calibrated for D4CB applications, offers several engineering advantages that make it a preferred choice for high‑mileage commercial vehicles:
Radial‑Piston Three‑Plunger Design — Three plungers arranged around an eccentric cam deliver exceptionally smooth, high‑volume fuel flow with minimal pressure pulsation, reducing mechanical stress on the common rail and injectors. This design is inherently more durable than single‑plunger alternatives.
Integrated Vane‑Type Transfer Pump — A built‑in low‑pressure vane pump draws fuel directly from the tank and supplies the high‑pressure plungers, eliminating the need for a separate lift pump in most D4CB applications. This simplifies installation and removes a potential failure point.
High‑Pressure Capability (Up to 1,600 bar) — The CP1 H3 variant is specifically engineered to operate at pressures up to 1,600 bar (23,200 psi) , ensuring fine fuel atomisation for complete combustion, even under heavy load or during high‑speed driving.
Fuel‑Lubricated High‑Pressure Section — The plungers and eccentric cam are lubricated solely by diesel fuel, eliminating external oil lines and ensuring consistent lubrication regardless of engine oil condition.
Robust Cast Housing with Integrated Damping Chambers — The pump body is manufactured from high‑strength cast aluminium with precision‑machined internal galleries that absorb pressure spikes, protecting the common rail and injectors from damage.
Electronically Controlled Flow Control Valve (ZME) — Equipped with an inlet metering solenoid valve that precisely regulates fuel entry based on ECU demand, delivering accurate rail pressure control, improved fuel economy, and lower emissions.
Direct Bosch CP1 H3 Compatibility — Identical mounting flange, drive shaft interface, high‑pressure outlet ports and electrical connector as the original Bosch 0445010333. Plug‑and‑play replacement for D4CB engines with no modifications required.
2. Compatible Vehicle Models (≤5)
The 0445010333 CP1 H3 pump is specifically calibrated for the Hyundai–Kia D4CB 2.5L CRDi diesel engine (inline‑4, turbocharged, common rail direct injection). Compatible vehicles include:
Hyundai H‑1 / Starex / i800 / iLoad (2008 onwards) — 2.5 CRDi, 81–125 kW, engine codes D4CB / D4CB‑W
Hyundai Terracan (selected diesel variants with D4CB engine)
Hyundai Porter / H100 (2.5 CRDi commercial variants)
Kia Sorento (1st generation / JC) (2002–2011) — 2.5 CRDi, 140–170 hp, engine code D4CB
Kia Carnival / Grand Carnival (early diesel variants with D4CB engine)
✅ Important Fitment Note — Cross‑reference numbers for this pump include 0445010207 and 33100‑4A420. Before ordering, always verify the Bosch number on your original pump (stamped on the pump body nameplate) and confirm your engine code (D4CB / D4CB‑W).
3. Common Failures & Installation/Replacement Advice
3.1 Typical Symptoms of a Failing 0445010333 Pump
Extended cranking time — Engine struggles to start, especially after overnight parking, due to insufficient rail pressure buildup.
Loss of power under load — Vehicle feels sluggish on inclines, when fully loaded, or during overtaking, often accompanied by black or white exhaust smoke.
Diesel contamination in engine oil — Rising oil level with a strong diesel smell. This indicates a failed drive shaft seal, as the CP1 pump shaft seal is the only fuel component directly connected to the engine’s oil passages.
DTC codes P0087, P0088, P0191 — Rail pressure too low, too high, or fuel pressure sensor rationality fault.
Unusual noise from pump area — Whining, grinding, or clicking sounds that change with engine RPM, indicating bearing or cam wear.
External fuel leakage — Visible diesel wetness around the pump body, particularly at the drive shaft seal or around the ZME valve mounting area.
Rough idle or engine surging — Inconsistent fuel delivery at low RPM, causing the engine to hunt or misfire.
3.2 Professional Installation & Replacement Recommendations
Perform a complete fuel system diagnosis — Before pump replacement, use a diagnostic tool (Hyundai GDS, Bosch KTS, or generic scanner with live data) to verify rail pressure values and identify any related faults in the system.
Replace all fuel filters — Install new OEM‑quality primary (water separator) and secondary fuel filters. Old filters can introduce contamination that will destroy a new pump within minutes.
Flush the entire fuel system — Drain and clean the fuel tank. Blow out all supply and return lines with compressed air. Replace any rubber hoses that show degradation. CP1 pumps are more tolerant than CP4 units, but debris from a failed pump will still cause premature failure.
Inspect and flow‑test all four injectors — Worn or stuck injectors with high return flow prevent the pump from building correct rail pressure and will cause repeat pump failure. Have injectors professionally tested and cleaned or replaced as necessary.
Check engine oil for diesel contamination — If diesel has leaked past the drive shaft seal, the engine oil will be diluted. Perform an oil and filter change BEFORE running the new pump.
Prime the low‑pressure circuit — Before starting the engine, use a hand vacuum pump on the fuel return line to pull bubble‑free fuel through the pump and filters. CP1 pumps are self‑priming but dry cranking will score the plungers and eccentric cam.
Fill the pump with clean diesel — Remove the high‑pressure outlet fitting and pour clean, lubricious diesel (or Bosch special assembly lubricant) into the pump housing to prevent dry start scoring.
Torque all connections to specification — High‑pressure outlet (M14×1.5 cone seal): 35–40 Nm. Low‑pressure inlet and return: 25 Nm. Drive shaft nut: consult vehicle workshop manual (typically 80–100 Nm for the D4CB engine).
Reset fuel adaptations — After installation, use a diagnostic tool to clear learned fuel trim values and perform a “high‑pressure pump adaptation” or “fuel system learn” routine. On D4CB engines, this procedure is typically found under “Diesel Fuel System” or “CRDi” in the diagnostic menu.
Perform a leak test — Idle the engine for 10 minutes, then inspect all high‑pressure and low‑pressure unions, the pump mounting area, and the drive shaft seal for any signs of fuel wetness.
Monitor rail pressure — Using live data on a diagnostic tool, verify that actual rail pressure tracks within ±20 bar of specified pressure across all RPM ranges.
💡 Pro Tip — The D4CB engine is particularly sensitive to diesel contamination in engine oil. If you notice rising oil levels or a diesel smell, inspect the CP1 pump drive shaft seal immediately. Delaying repair can lead to serious engine damage.
4. Why Choose Rsolid Engine Parts as Your Supplier
✅ Exact Bosch CP1 H3 Compatibility — Direct replacement for 0445010333 in all listed Hyundai & Kia D4CB applications. No modifications, no adapters.
✅ 100% Calibration Tested — Each pump is run on a Bosch EPS 200 or equivalent test bench to verify delivery volume, rail pressure stability, ZME regulator response, and leak‑free operation. Test reports available upon request.
✅ 12‑Month Warranty — Full coverage against manufacturing defects for all pumps supplied, even for high‑mileage commercial applications.
✅ Competitive Pricing for Workshops & Fleets — Volume discounts available for mechanics, garages, parts distributors, and fleet operators.
✅ Fast Worldwide Shipping — Stock held in multiple warehouses for rapid dispatch to Asia, Africa, Europe, the Americas, and the Middle East.
✅ Expert Technical Support — Our diesel injection specialists provide pre‑purchase fitment verification, diagnostic assistance, and detailed installation guidance via WhatsApp or email.
Contact Rsolid Engine Parts Today
📞 WhatsApp: +8615975376778
📧 Email: amy@rinjector.com
