Product Introduction: A precision-engineered piezoelectric common rail injector with a stainless steel housing and a high-pressure fuel inlet. It features a solenoid valve for precise fuel metering, a spray nozzle with multiple holes for optimal atomization, and protective red caps for the fuel inlet and nozzle. The unit incorporates a built-in pressure sensor for real-time feedback to the ECU.

Product Function: Delivers high-pressure diesel fuel into the engine cylinder in precise quantities and at optimal timing, ensuring complete combustion, maximum power output, and reduced exhaust emissions. The piezoelectric actuation enables ultra-fast response times, while the multi-hole nozzle ensures fine fuel atomization for improved fuel efficiency and lower noise levels.

High-Pressure Common Rail Injector 5491515 for Cummins ISG12 Engine

When your Cummins ISG12 engine demands peak fuel delivery performance, the High-Pressure Common Rail Injector 5491515 steps up and delivers. This precision-engineered injector controls fuel atomization at pressures exceeding 1800 bar, ensuring every combustion cycle runs clean, powerful, and efficient. Built to meet OEM specifications, it keeps your heavy-duty fleet on the road where it belongs — not in the workshop.

METTLEAD Truck Parts supplies this injector directly from quality-certified production lines in China, giving procurement managers worldwide access to genuine-grade quality at factory-direct prices — with no middlemen inflating your costs.

Key Features and Benefits of the 5491515 Common Rail Injector

• Precision Fuel Atomization — The multi-hole nozzle tip delivers an ultra-fine spray pattern that maximizes combustion efficiency across all RPM ranges, helping your Cummins ISG12 breathe easier and burn cleaner.
• High-Pressure Performance (up to 2000 bar) — Engineered to withstand extreme injection pressures, ensuring consistent fuel delivery even under the heaviest loads and most demanding duty cycles.
• OEM-Matching Build Quality — Every injector undergoes strict dimensional and flow-rate testing to match Cummins original specifications, so it drops right into your ISG12 engine without recalibration headaches.
• Extended Service Life — Premium internal components resist carbon buildup and wear, pushing replacement intervals further and cutting your total cost of ownership.
• Lower Emissions Compliance — Optimized spray geometry supports China VI and Euro VI emission standards, keeping your fleet compliant with tightening regulations.
• Rapid Solenoid Response — Fast-acting electromagnetic valve enables multiple injection events per cycle (pilot, main, post), reducing combustion noise and improving driver comfort.

Technical Specifications — Injector 5491515 Cummins ISG12

Application — Vehicle and Engine Fitment

The High-Pressure Common Rail Injector 5491515 is purpose-built for the Cummins ISG12 engine platform — a 11.8-liter inline-six diesel powerplant widely adopted across Chinese and international heavy-duty truck OEMs. You will find this injector hard at work in:

• SINOTRUK SITRAK C7H / G7 — Long-haul logistics tractor units powered by Cummins ISG12 engines delivering 400–560 HP.
• FAW Jiefang J7 / J6P — China’s flagship highway logistics trucks, where the ISG12 provides the torque backbone for 40-tonne gross combination weight operations.
• Foton Auman EST-A — Intercity and regional distribution trucks relying on ISG12 power for fuel-efficient route performance.
• Dongfeng Tianlong KX / KL — Heavy-duty line-haul platforms pairing ISG12 reliability with high-payload corridor logistics.
• Mining and Construction Vehicles — Off-highway dump trucks and specialized vehicles that demand injector durability under extreme vibration and thermal stress.

Whether your fleet runs express freight across Central Asia or hauls ore in African mining corridors, this injector keeps the Cummins ISG12 performing at its rated output — kilometer after kilometer.

OEM / ODM Capability and Custom Packaging

METTLEAD understands that bulk buyers and regional distributors need more than just parts — they need a supply partner that adapts. Here is what we bring to the table:

• White-Label Packaging — We ship injector 5491515 under your own brand identity with custom box design, labels, and documentation. Your customers see your name, not ours.
• Custom Packaging Quantities — Order in sets of 6 (full engine kit), carton lots, or full-pallet quantities tailored to your warehouse and distribution workflow.
• Strict Quality Control — Each injector is individually tested for spray pattern, leakage, and flow rate before packing. Batch traceability documentation is provided with every shipment.
• Flexible MOQ — Whether you need a trial order of 10 pieces or a container load of 2,000, we structure pricing tiers that reward commitment without punishing caution.

Customer Case Study — 5491515 Injector Bulk Supply to East Africa

In Q1 2024, a fleet maintenance company in Nairobi, Kenya reached out to METTLEAD looking for a reliable source of High-Pressure Common Rail Injector 5491515 for Cummins ISG12 engines. They managed a fleet of 120 SINOTRUK SITRAK tractor units running intercity cargo routes between Mombasa and Kampala.

Their challenge was straightforward but painful: local suppliers offered the 5491515 injector at inflated prices with inconsistent quality — some units failed within 30,000 km. Downtime was eating into their profit margins.

METTLEAD supplied an initial batch of 60 units of injector 5491515, each flow-tested and packaged with individual QC reports. The client installed them across 10 trucks for a controlled trial.

Results after 6 months:

• Zero premature failures across all 60 injectors
• Average fuel consumption improved by 3.2% compared to previous third-party replacements
• Procurement cost reduced by 35% versus their former local supplier
• The client placed a follow-up order of 240 units with white-label packaging for resale to smaller fleet operators

This is what happens when you combine genuine-quality 5491515 common rail injectors with a supplier who actually tests what they ship.

Frequently Asked Questions — Injector 5491515 Cummins ISG12

Is the 5491515 injector compatible with all Cummins ISG12 engine variants?

Yes. The 5491515 common rail injector is designed to fit all Cummins ISG12 engine variants (ISG12E4, ISG12E5, ISG12E6) regardless of the power rating. However, the ECU calibration may differ between 400 HP and 560 HP versions, so always confirm your engine’s ECU software matches the injector coding.

What is the maximum service life of the 5491515 high-pressure injector?

Under normal operating conditions with clean diesel fuel (meeting EN 590 or GB 19147 standards), the 5491515 injector typically delivers 200,000–300,000 km of reliable service. Contaminated fuel or water ingress can shorten this significantly, so proper fuel filtration is essential.

Can I replace a single injector, or should I replace all six at once?

You can replace individual injectors without issues. However, if one injector has failed due to high mileage and the remaining five are approaching similar service hours, replacing the full set ensures balanced fuel delivery across all cylinders and avoids repeat downtime.

Does the 5491515 injector require coding or programming after installation?

Yes. Each common rail injector carries a unique IQA (Injection Quantity Adjustment) code that must be entered into the Cummins ECU via a diagnostic tool (such as INLINE or Cummins INSITE). This ensures the engine compensates for manufacturing tolerances and delivers optimal performance.

How does this injector handle poor-quality diesel fuel common in developing markets?

The 5491515 injector uses hardened nozzle materials that resist erosion from abrasive particles. That said, we strongly recommend installing a 2-micron fuel filter and a water separator upstream of the high-pressure pump to protect the injector’s internal precision surfaces.

What is the difference between your 5491515 injector and a remanufactured unit?

Our 5491515 injectors are brand-new production units — not rebuilt cores. Every internal component (nozzle, valve, solenoid, spring) is manufactured fresh and assembled under ISO 9001 conditions. Remanufactured injectors reuse worn bodies and may exhibit inconsistent flow rates and shorter service intervals.

Ready to Secure Your Supply of 5491515 Cummins ISG12 Injectors?

Stop overpaying for inconsistent quality. METTLEAD delivers High-Pressure Common Rail Injector 5491515 direct from our quality-controlled production lines — tested, certified, and ready to keep your Cummins ISG12 fleet running at full power.

Get a competitive quote today:

• Tell us your required quantity and delivery destination
• Receive a detailed quotation within 24 hours
• Enjoy flexible payment terms and fast logistics

👉 Contact METTLEAD Now for a Free Quote

Browse our full range of Cummins engine components — fuel injectors, fuel pumps, turbochargers, sensors, and more — all in stock and ready to ship:

👉 View All Cummins Engine Parts