Common Rail Assembly 23810-30100 For TOYOTA Hilux KUN10 KUN26 Land Cruiser KDJ120 KDJ150 Prado 1KD-FTV 2KD-FTV — Genuine OEM DENSO, Euro 4

The Common Rail Assembly with OEM number 23810-30100 is a verified direct-fit replacement for TOYOTA 1KD-FTV (3.0L) and 2KD-FTV (2.5L) common-rail diesel engines. This component is a core part of the high-pressure fuel injection system, responsible for storing pressurized fuel and distributing it to the injectors via the fuel rail, while maintaining stable pressure for efficient combustion and optimal engine performance.

Manufactured by DENSO, this genuine OEM common rail assembly meets Euro 4 emission standards and is widely used in TOYOTA Hilux (N70, KUN10, KUN16, KUN26), Land Cruiser Prado (KDJ120, KDJ125, KDJ150, KDJ155), Hiace, and Fortuner models from 2004 onward.

• OE Number Verified: 23810-30100 — Genuine DENSO common rail assembly, replacing OEM numbers 2381030100, 23810-0L030, 095440-0953, 499000-6081.
• Manufacturer Verified: DENSO — original equipment manufacturer for Toyota's common-rail fuel systems, ensuring OEM-grade quality and reliability.
• Material & Construction Verified: Manufactured from high-strength steel with precision-machined internal passages for stable fuel pressure delivery under high-pressure common-rail operation.
• Weight Verified: 2.7 kg per unit — consistent with OEM specification for the 1KD-FTV/2KD-FTV fuel rail assembly.
• Emission Standard Verified: Euro 4 — specifically designed for Euro 4 specification 1KD-FTV engines equipped with electronic pressure relief valve on fuel rail PN 23810-30100.
• Multi-Platform Compatibility: Confirmed compatible with TOYOTA Hilux (N70, KUN10, KUN16, KUN25, KUN26, KUN35), Land Cruiser Prado (KDJ120, KDJ125, KDJ150, KDJ155), Hiace, and Fortuner equipped with 1KD-FTV/2KD-FTV engines.

• Limp mode / reduced power: The engine enters limp mode due to fuel rail pressure faults — often caused by a failing electronic pressure relief valve on the rail.
• Hard starting / extended cranking: Insufficient fuel rail pressure prevents proper injector operation, leading to difficult starting.
• Rough idle or misfire: Inconsistent fuel pressure delivery to injectors causes unstable combustion and engine vibration.
• Fuel leak at rail: Visible diesel leakage around the rail connections or pressure sensor port — indicates seal or fitting failure.
• Diagnostic trouble codes (DTCs): Error codes related to fuel rail pressure (P0087, P0088, P0093) — indicating rail pressure regulation issues.

Euro4x4parts confirms fitment for KDJ120 (08/2006–07/2009), KDJ125 (08/2006–07/2009), KDJ150 (08/2009–07/2020), KDJ155 (08/2009–07/2016), Hilux KUN26 3.0 D4D (10/2006–07/2011), KUN25 2.5 D4D (08/2009–07/2011), KUN15 2.5 D4D (08/2009–03/2012), and KUN35 2.5 D4D (08/2011+). Rexwell Auto Parts confirms fitment for Hilux Land Cruiser 1KD KUN10 KDJ120. DENSO technical documentation confirms compatibility with Hilux N70 KUN16/KUN26, Prado 120/150, and Hiace.

• Euro 4 Specification Required: This common rail assembly is specifically designed for Euro 4 specification 1KD-FTV engines equipped with an electronic pressure relief valve on the fuel rail. Verify your vehicle's emission standard before ordering.
• Left vs. Right Distinction: This part number (23810-30100) is for the left side rail. The right side rail uses a different OEM number (23810-30110). Confirm position before ordering.
• VIN Verification Required: Euro4x4parts recommends contacting with the VIN (vehicle identification number) to ensure correct fitment, as variations exist across model years and specifications.
• Confirm engine variant: 1KD-FTV (3.0L) vs. 2KD-FTV (2.5L) — both are supported, but always verify against the engine tag.
• Always verify OEM number against the engine tag or vehicle documentation before ordering.

Each unit undergoes 100% quality inspection before packaging. Manufactured by DENSO to OEM specification standards for common-rail fuel injection systems.

1. Safety first: Ensure the engine is completely cool. Disconnect the negative battery terminal. Wear safety glasses and gloves. Diesel fuel is flammable and under high pressure.
2. Depressurize the fuel system: Follow the manufacturer's procedure to relieve fuel pressure before disconnecting any fuel lines.
3. Disconnect fuel lines: Carefully disconnect the high-pressure fuel lines from the rail. Use clean caps to plug all open ports immediately to prevent contamination.
4. Disconnect electrical connectors: Unplug the fuel rail pressure sensor and electronic pressure relief valve connectors.
5. Remove mounting bolts: Unbolt the common rail assembly from the engine block or cylinder head. Note the orientation of spacers and brackets.
6. Remove old rail: Extract the failed rail assembly. Inspect the mounting surface and fuel line connections for damage or contamination.
7. Install new rail: Position the new common rail assembly (23810-30100) onto the mounting points. Hand-tighten mounting bolts first.
8. Torque mounting bolts: Tighten mounting bolts to specification — always confirm against the specific vehicle model workshop manual.
9. Reconnect fuel lines: Connect the high-pressure fuel lines to the rail. Tighten to specified torque — fuel line fittings require precise torque to prevent leaks. Do not over-torque.
10. Reconnect electrical connectors: Plug in the fuel rail pressure sensor and electronic pressure relief valve connectors.
11. Bleed the fuel system: Cycle the ignition several times (without starting) to prime the fuel system. Check for leaks before starting the engine.
12. Start and test: Start the engine and verify smooth idle, proper rail pressure, and absence of fault codes. Road-test to confirm performance restoration.

• Inspect fuel system at every 40,000–50,000 km or during any major service.
• Replace fuel filter every 20,000–30,000 km — contaminated fuel is a leading cause of common-rail component failure.
• Use only high-quality diesel fuel meeting Euro 4 standards — water and contaminants in fuel accelerate rail and injector wear.
• Monitor for fault codes: Scan for fuel rail pressure DTCs at every service interval. Early detection prevents catastrophic failure.
• ⚠️ 1KD-FTV Special Note: Euro 4 specification 1KD-FTV engines with electronic pressure relief valve on the fuel rail (PN 23810-30100) require the correct valve type. Using a non-Euro 4 rail or mismatched valve can cause persistent limp mode and error codes.

• Standard packing: Original Packing / Neutral Packing / Custom Packing available.
• Package contents: 1 × Common Rail Assembly (installation hardware not included).
• Suitable for: Diesel fuel system repair shops, fleet maintenance departments, spare parts distributors, and export wholesalers.
• Related parts available: Fuel rail pressure sensor, electronic pressure relief valve, high-pressure fuel pump, injectors, and complete common-rail fuel system components.