null AW-17220743903, GT-K4ZB5X3V
CUMMINS

CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)

(No reviews yet) Write a Review
SKU:
CUM3926103
MPN:
3926103
Shipping:
Free Shipping
  • CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)
  • CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)
  • CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)
  • CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)
  • CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)
  • CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)
  • CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)
  • CUMMINS 3926103 OEM FUEL INJECTOR RETURN LINE – RAM 5.9L 12-VALVE (1994–1998)
$319.69

Description

Genuine Cummins

Cummins 3926103 — Fuel Injector Return Line (Leak-Off / Overflow)

MPN: 3926103  |  Also Known As: injector overflow line, leak-off line, fuel return manifold  |  Cross-Ref: Mopar 4762042

Why This Part

  • OE hardline assembly routes excess fuel back to the tank.
  • Direct-fit for 1994–1998 Ram 5.9L 12-valve (P7100) applications.
  • Restores reliability—prevents leaks, hard starts, and no-start conditions from cracked lines.
  • Durable steel construction with factory bends and sealing interfaces.
OE Fit Stock Replacement 1 Per Engine

Quick Specs

Type Fuel injector return line / leak-off manifold
OE Part # 3926103 (Mopar 4762042)
Fuel System 6BT 12-Valve with P7100
Qty Required 1 per engine (sold individually)

Verified Fitment (Automotive)

Year RangeEngineChassis
1994–1998 Ram 5.9L 6BT 12-Valve (P7100) Ram 2500/3500

Industrial/Off-Highway: Also used across select 6B5.9/QSB5.9 applications—verify by ESN before ordering.

Often Paired With

  • Return Line Seal: Cummins 4942278 (’94–’98)
  • Banjo Bolt: Cummins 3905307 (’89–’98)
  • Fresh hose washers & inspection after install

What’s In The Box

  • (1) Genuine Cummins Fuel Injector Return Line (3926103)
  • Fittings/seals sold separately (see “Often Paired With”).

Install Tips

  • Work on a cool engine; clean around connections to avoid contamination.
  • Replace seals/banjo hardware; torque to factory spec.
  • Prime the system and check for leaks; recheck after first heat cycle.

FAQ

WILL THIS FIT MY 1994–1998 12-VALVE CUMMINS RAM?

Yes—3926103 is the OE injector return (leak-off) line for 1994–1998 Ram 5.9L 12-valve with the P7100 pump (verify by VIN/ESN).

DOES THIS INCLUDE THE BANJO BOLT AND SEAL?

No—order the banjo bolt (3905307) and seal (4942278) separately if needed.

WHAT SYMPTOMS POINT TO A FAILED RETURN LINE?

Fuel smell, wet spots, visible cracks, hard starts, or no-start after sitting are typical signs.

IS THIS A GENUINE CUMMINS PART?

Yes—OE Cummins 3926103 with factory geometry and materials.

WILL THIS FIT 24-VALVE OR 6.7L TRUCKS?

No—this listing targets the 5.9L 12-valve (’94–’98). Later engines use different assemblies.

View AllClose

Additional Information

Vehicle Year:
1994,1995,1996,1997,1998
Vehicle Make:
DODGE
ENGINE:
5.9L
View AllClose

0 Reviews

View AllClose