Zexel (now part of Bosch) is a renowned Japanese manufacturer of precision diesel fuel injection pumps, widely used as OEM equipment across Komatsu, Isuzu, Nissan, and other major Japanese diesel engine applications. The 104135-4100 is a genuine new original Zexel injection pump — not aftermarket or remanufactured — delivering factory-original fuel metering, timing, and pressure regulation for the diesel systems it serves. When an injection pump fails, you'll experience hard starts, rough running, loss of power, excessive smoke, and in severe cases complete engine shutdown. Replacing with a genuine original unit restores full fuel system integrity.

✅ Direct-Fit Compatibility

• Make: Zexel (Bosch)
• Application: Diesel engines and equipment fitted with the Zexel 104135-4100 injection pump
• Direct replacement — no modifications required

🔧 Product Highlights

• New Original Zexel: Genuine factory unit — not aftermarket or remanufactured
• OEM-Spec Fuel Metering & Timing: Factory-calibrated for correct injection timing, pressure, and fuel delivery across all operating conditions
• Direct Drop-In Fit: No modifications required; installs like the original
• Dual Part Number Format: Covers both 104135-4100 and 1041354100 for confirmed fitment
• Maximum Reliability: Genuine OEM provenance for a critical fuel system component
• Significant Cost Savings: Genuine original quality without dealer markup

📦 What's Included

• 1 × Fuel Injection Pump (104135-4100)

🔑 Key Specs

• Part Numbers: 104135-4100, 1041354100
• Condition: New Original (Zexel OEM)
• Manufacturer: Zexel (Bosch)

Please verify your engine serial number and existing pump part number before ordering. Contact us for fitment confirmation if needed.