The Isuzu 4JJ1 is a modern common rail diesel engine powering the Isuzu TFR pickup and NPR medium-duty truck across Asia, Australia, and global markets. This is a 4-piece set of new original nozzle injector assemblies, manufactured in Japan, covering part numbers 8-98011604-5 and 8980116045 — a complete full-engine replacement for all four cylinders. Genuine Japanese-made OEM quality for buyers who require authentic original components and want to service the entire 4JJ1 fuel system in a single order.

✅ Direct-Fit Compatibility

• Isuzu Engine: 4JJ1 (4-cylinder common rail diesel)
• Isuzu Models: TFR (pickup), NPR (medium-duty truck)
• Direct replacement — no modifications required

🔧 Product Highlights

• New Original — Made in Japan: Genuine Japanese-manufactured OEM units — not aftermarket or remanufactured
• Complete 4-Cylinder Set: Full engine coverage in a single order — no need to source injectors individually
• OEM-Spec Fuel Atomization: Precise nozzle spray pattern for clean combustion, restored power, and fuel economy across all four cylinders
• Prevents Cascading Failures: Replacing all four eliminates future unplanned downtime from remaining worn injectors
• Best Value for Full-Engine Service: Lower cost-per-injector vs. single replacement
• Authentic Japanese Provenance: Manufactured in Japan to original Isuzu specifications

📦 What's Included

• 4 × Nozzle Injector Assemblies (8-98011604-5 / 8980116045)

🔑 Key Specs

• Part Numbers: 8-98011604-5, 8980116045
• Condition: New Original (Made in Japan)
• Quantity: 4 pieces (complete 4-cylinder set)
• Fitment: Isuzu 4JJ1 engine; TFR pickup / NPR truck

⚠️ No Warranty: This part is sold as-is with no warranty offered. Please verify your engine serial number and existing part number before ordering. Contact us for fitment confirmation if needed.