Product Description
The CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE is designed for 1989–1998 5.9L Cummins 12-valve diesel engines. This genuine Cummins fuel return line helps route excess fuel from the injectors back to the fuel system, maintaining proper fuel circulation and reliable engine operation.
Use this part when repairing fuel leaks, replacing damaged return lines, or restoring the factory fuel return system during maintenance or engine rebuild work. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM fuel injector return line
- Direct-fit replacement for factory return line assembly
- Designed for 5.9L Cummins 12-valve engines
- Helps maintain proper fuel circulation and injector operation
- Ideal for repair, maintenance, or restoration projects
FITMENT
- 1989–1993 Dodge Ram D/W 250 and D/W 350 5.9L Cummins 12-Valve
- 1994–1998 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
- Select Cummins 6BT industrial and commercial applications
WHAT'S INCLUDED
- 1 Cummins 3926103 OEM Fuel Injector Return Line
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3926103
- Cummins Injector Return Line Seals
- Cummins Fuel Injector Feed Tubes
- Cummins Fuel Transfer Pump Components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3926103
- Part Type: Fuel Injector Return Line
- Engine Compatibility: 5.9L Cummins 12-Valve (6BT)
- Fitment Years: 1989–1998
- Vehicle Application: Dodge Ram 2500 and 3500
- Fuel System Component: Yes
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
FAQ
Will this fuel injector return line fit my truck?
This return line fits the applications listed above, including many 1989–1998 5.9L Cummins 12-valve engines. Always verify fitment by engine serial number before ordering.
What does the injector return line do?
The injector return line routes excess fuel from the injectors back into the fuel system, helping maintain proper fuel circulation and injector performance.
Is this a genuine Cummins part?
Yes. Cummins 3926103 is a genuine OEM replacement fuel injector return line manufactured to factory specifications.
What are common signs of a failing return line?
Fuel leaks, cracked tubing, deteriorated seals, fuel odor, or visible damage to the return circuit may indicate that replacement is needed.
What is included with this part?
This listing includes one Cummins 3926103 OEM fuel injector return line.
Do I need any related parts?
Inspect injector return seals, injector connectors, fuel supply lines, and related fuel system components during installation and replace worn parts as necessary.
