✅ Compatibility

• Make: Cummins
• Compatible Engine: Cummins 4BT 3.9L 4-cylinder Diesel (B-series)
• OEM / Cross Reference Part Numbers:
  • Cummins: 3932123, 3802905, 3802905RX
  • Bosch: 0432131694
• Typical Vehicle / Equipment Applications (Cummins 4BT 3.9L powered):
  • Medium-duty trucks and vans with Cummins 4BT 3.9L diesel
  • Jeep and off-road vehicle engine swaps (Cummins 4BT swap)
  • Agricultural and construction equipment with Cummins 4BT
  • Marine applications with Cummins 4BT diesel
  • Timberjack 230 / Dresser 510B and other industrial equipment
• Note: Verify your engine serial number and existing injector part number before ordering. Contact us for fitment confirmation.

🔧 Product Highlights

• Direct OEM Replacement: Drop-in fit for Cummins 4BT 3.9L diesel engine applications — matches original Bosch mechanical fuel injector specifications for precise fuel delivery and combustion performance
• Bosch OEM Injector — Original Equipment Supplier for Cummins 4BT 3.9L: Bosch is the original equipment supplier for the Cummins 4BT 3.9L mechanical fuel injectors — the 0432131694 is the Bosch OEM reference for this application, ensuring OEM-equivalent fuel delivery performance
• Cummins 4BT 3.9L — The World’s Most Popular Diesel Engine Swap Platform: The Cummins 4BT 3.9L is one of the most widely used and beloved diesel engines globally — renowned for its compact size, legendary reliability, and massive torque output. The 4BT is the #1 diesel engine swap choice for Jeep Wranglers, Land Cruisers, and off-road builds, and remains in widespread service in trucks, vans, agricultural equipment, and marine applications worldwide
• Restores Proper Fuel Delivery and Engine Performance: Corrects hard starting, black smoke, rough idle, power loss, and excessive fuel consumption caused by worn or clogged injectors on Cummins 4BT 3.9L applications
• New Aftermarket Quality: Manufactured to Cummins / Bosch OEM specifications for reliable mechanical injection performance in demanding diesel applications

📦 What's Included

• 1× Fuel Injector (3932123 / 3802905) — New Aftermarket

🔑 Key Specs

• Cummins Part Numbers: 3932123, 3802905, 3802905RX
• Bosch Part Number: 0432131694
• Compatible Engine: Cummins 4BT 3.9L 4-cylinder Diesel (B-series)
• Injection Type: Mechanical (Bosch P-pump / VE-pump compatible)
• Quantity: 1 piece
• Condition: New Aftermarket
• SKU: 3932123

⚠️ Please verify your engine serial number and existing injector part number before purchasing. If unsure of compatibility, contact us with your Cummins engine serial and we will confirm fitment.