Product Description
The CUMMINS 4988809 OEM #3 FUEL INJECTION LINE (INJECTOR FUEL SUPPLY TUBE) is designed for 2003–2007 Dodge Ram trucks equipped with the 5.9L Common Rail Cummins diesel engine. This genuine Cummins injector fuel supply tube provides the high-pressure connection between the fuel rail and the number three injector while maintaining proper sealing and fuel delivery.
Use this part when replacing a damaged, leaking, corroded, or improperly sealed injector connector tube. Proper injector tube sealing is critical for maintaining fuel pressure, injector performance, and engine reliability. Always verify fitment by engine serial number and part number before ordering.
FEATURES
- Genuine Cummins OEM fuel injection line
- Designed for the number three cylinder injector location
- Direct-fit replacement injector fuel supply tube
- Maintains proper high-pressure fuel delivery
- Helps prevent fuel leakage and pressure loss
- Ideal for injector service, repair, or replacement work
FITMENT
- 2003–2007 Dodge Ram 2500 5.9L Cummins Common Rail
- 2003–2007 Dodge Ram 3500 5.9L Cummins Common Rail
- 5.9L ISB Cummins equipped with Bosch common rail fuel injection
WHAT'S INCLUDED
- 1 Cummins 4988809 OEM #3 Fuel Injection Line / Injector Fuel Supply Tube
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 4988809
- Injector Connector Tubes for Cylinders 1, 2, 4, 5, and 6
- Common Rail Fuel Injectors
- Fuel Rail Pressure Relief Components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 4988809
- Part Type: Fuel Injection Line / Injector Fuel Supply Tube
- Cylinder Location: Number 3
- Engine Compatibility: 5.9L Cummins Common Rail
- Fitment Years: 2003–2007
- Vehicle Application: Dodge Ram 2500 / 3500
- Fuel System Type: Bosch Common Rail
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
FAQ
Will this part fit my truck?
This injector supply tube fits many 2003–2007 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L Common Rail Cummins engine. Always verify fitment using your engine serial number and part number before ordering.
What does this fuel injection line do?
This connector tube transfers high-pressure fuel from the common rail to the number three fuel injector while providing a precision sealing surface.
Should injector connector tubes be replaced during injector service?
Yes. Cummins recommends replacing connector tubes whenever injectors are removed to help ensure proper sealing and fuel system performance.
What are the symptoms of a damaged connector tube?
Common symptoms include hard starting, rough idle, fuel pressure issues, injector sealing problems, excessive smoke, or fuel system diagnostic trouble codes.
Is this a genuine Cummins part?
Yes. Cummins 4988809 is a genuine OEM injector fuel supply tube manufactured to Cummins specifications.
Do I need any related parts?
Inspect the injector, injector hold-down hardware, high-pressure fuel lines, fuel rail components, and connector tubes for the remaining cylinders during service and replace worn parts as necessary.
