DEF Injector for Cummins ISX & ISX15 — Precision Dosing, Proven Durability
Direct replacement for Cummins ISX (2010-2018) and ISX15 / X15 (2017+) SCR systems. Flow-calibrated to ±2%, 500,000+ cycle service life, IP67 rated. Ships with individual test data sheet.
Product Overview
Designed as a direct-fit replacement for the Cummins ISX and ISX15 heavy-duty diesel engines, this DEF injector delivers the precise urea dosing that the SCR aftertreatment system demands. Each unit undergoes multi-point flow calibration on an engine simulator before shipment — you receive the actual test data, not just a batch certificate.
Key Benefits
- Direct replacement for Cummins OEM part numbers 4384094, 5302156, 4384095
- ±2% flow calibration at 5, 7, and 9 bar pressure points — test data included
- 500,000+ cycle service life under normal on-highway operating conditions
- IP67 sealed against dust and temporary immersion — survives pressure washing
- 24-month / 200,000 km warranty with replacement shipped within 5 business days
- Pre-shipment inspection photos and data available on request
Technical Specifications
| Parameter | Specification |
|---|---|
| Application | Cummins ISX (2010-2018), ISX15 / X15 (2017+) |
| OEM Cross-Reference | 4384094, 5302156, 4384095 |
| DEFinjector Part Number | DFI-ISX-001 |
| Flow Rate (nominal) | 15.0 L/h at 7 bar |
| Flow Accuracy | ±2% of nominal |
| Supply Voltage | 12V DC |
| Coil Resistance | 12 ± 1 Ω at 20°C |
| Connector Type | Deutsch DT 2-pin |
| DEF Fitting | Quick-connect, 8mm barb |
| Operating Temperature | -40°C to +175°C |
| Enclosure Rating | IP67 |
| Nozzle Material | Hardened 304 stainless steel |
| Body Material | 304 stainless steel |
| Seal Material | Viton (FKM) — standard; PTFE / HNBR available |
| Spray Cone Angle | 28° ± 3° |
| Droplet Size (SMD) | <50 μm at rated pressure |
| Service Life | 500,000+ cycles (typical on-highway) |
| Warranty | 24 months / 200,000 km |
| MOQ | 50 units (standard); 1-5 units (sample) |
| Lead Time | 15-25 days (standard); 5-7 days (sample by air) |
Flow Calibration Data (Sample)
Each unit ships with individual test data.
| Test Point | Pressure | Target Flow | Measured Flow | Pass/Fail |
|---|---|---|---|---|
| Point 1 | 5 bar | 12.0 L/h | 12.1 L/h | Pass |
| Point 2 | 7 bar | 15.0 L/h | 14.9 L/h | Pass |
| Point 3 | 9 bar | 17.5 L/h | 17.3 L/h | Pass |
| Leak Test | 13.5 bar (150% rated) | Zero leakage | Zero leakage | Pass |
| Spray Pattern | 7 bar | Uniform cone | Uniform cone | Pass |
Compatibility
Direct Fit — No Adapter Required
| Engine | Model Years | Emissions Standard |
|---|---|---|
| Cummins ISX | 2010-2018 | EPA 2010 / Tier 4 Final |
| Cummins ISX15 | 2017-2024 | EPA 2017 / Tier 4 Final |
| Cummins X15 | 2017+ | EPA 2017+ / Tier 4 Final |
| Cummins QSK (Industrial) | 2010+ | Tier 4 Final |
Vehicle Applications
- Freightliner Cascadia (2010-2024)
- Kenworth T680 / T880 (2010-2024)
- Peterbilt 579 / 389 (2010-2024)
- International ProStar / LT / RH (2010-2024)
- Western Star 5700XE / 4900 (2010-2024)
- Volvo VNL (2010-2017 — ISX-equipped models)
Ordering Information
| Order Type | MOQ | Lead Time | Shipping |
|---|---|---|---|
| Sample / Evaluation | 1-5 units | 5-7 days | Air courier |
| Small Batch | 50 units | 15-20 days | Air freight |
| Standard Order | 500 units | 20-25 days | Sea freight LCL |
| Bulk Order | 2,000+ units | 25-30 days | Sea freight FCL |
Payment Terms: T/T 30% deposit, 70% before shipment. L/C at sight for orders over $50,000.
Incoterms: FOB Shanghai (standard), CIF / DDP available on request.
Quality & Certification
- IATF 16949 manufacturing quality management
- 100% functional testing on calibrated engine simulator
- Individual flow calibration data provided with every unit
- Material certifications: 304 stainless steel (body), Viton FKM (seals), hardened SS (nozzle)
- $10M product liability insurance
FAQ
How do I know if my injector needs replacement?
Common signs: check engine light with SPN 4334 (DEF dosing valve) or SPN 5397 DTC codes, white crystal deposits around the injector mounting point, DEF consumption outside the 3-5% of fuel range, or failed emissions test.
Does this injector work with my ISX engine management software?
Yes. This injector is electrically and mechanically identical to the OEM specification. The Cummins ECM will recognize it as a standard DEF dosing valve. No software modifications needed.
Can I get a sample before placing a bulk order?
Yes. We provide 1-5 sample units at evaluation pricing. Pre-shipment inspection photos and test data provided before dispatch.
Related Resources
How to Install a DEF Injector on a Cummins ISX Engine
Complete installation procedure with step-by-step instructions, J1939 diagnostic steps, and torque specifications for ISX and ISX15 engines.
OEM Part Number Cross-Reference Guide
Verify OEM compatibility: this injector cross-references to part numbers 4384094, 5302156, and 4384095 in our full Cummins DEF injector compatibility chart.
DEF Injector Failure Symptoms & Troubleshooting
Before ordering, confirm the diagnosis with our troubleshooting guide covering DTC codes SPN 4334, SPN 5397, and common failure patterns.
Quality Assurance: Testing & Certifications
Every ISX injector ships with individual flow calibration data — part of our DEF injector quality assurance program aligned to IATF 16949.
Request a Quote — Bulk Pricing Available
Ready to order? Request a quote for Cummins ISX DEF injectors with quantity-tier pricing from 50 to 2,000+ units.