The part number 0432193645 is associated with a fuel injector for the Cummins ISB 5.9L diesel engine. Here’s what you need to know:

Key Details:

Part Number: 0432193645

Application: Cummins ISB 5.9L (common in Dodge Ram 2500/3500 with the 5.9L Cummins, particularly in models from the mid-2000s)

Injector Type: Likely a Bosch or Cummins remanufactured unit (depending on supplier)

Engine Compatibility:

ISB 5.9L (2003–2007) – Common in Dodge Ram trucks (2003–2007.5)

May also fit earlier/later models, but verify compatibility.

Notes:

Reman vs. New:

This part number is often sold as a remanufactured injector (restored to OEM specs).

New OEM injectors may have a different part number (e.g., 0432240600 for newer replacements).

Symptoms of a Bad Injector:

Hard starting, rough idle, misfires, excessive smoke (white or black), or poor fuel economy.

Installation Tips:

Always replace injector seals and washers when installing.

Torque to spec (typically ~50–60 lb-ft for the hold-down bolt).

Perform a cylinder contribution test (using a scan tool) to verify proper operation after replacement.

1. Type & Design

• Electro-hydraulic injector (operates via high-pressure oil from the fuel rail and an electronic solenoid).

• Pop pressure: Typically around 23,000–26,000 psi (varies slightly by calibration).

• Nozzle type: Multi-orifice (usually 6–8 holes) for optimized spray pattern.

• Body material: Hardened steel with copper sealing washers.

2. Flow Rate & Calibration

• Flow rate: ~280–310 cc/min (varies based on calibration for specific engine tuning).

• Calibration code: Each injector has a unique calibration number (important for ECM matching in some applications).

3. Electrical Specifications

• Solenoid resistance: ~0.5–2.0 ohms (measured across terminals).

• Voltage requirement: 12V DC (pulsed signal from ECM).

• OEM Cross References:

  0-432-193-645, 0432193645, 045996, 149-888-0003, 1498880003, 19700183D, 3944200, 3944200RX, 432193645, JR944200