Cummins 3949769 — Genuine Engine Oil Pan

MPN: 3949769  |  Also Known As: lower oil sump, oil pan  |  Replaces/Related: uses gasket 3958165; common drain plug 3973071

Replace rusted or damaged pans the right way. The genuine Cummins 3949769 oil pan is the OE, direct-fit pan for 2003–2007 Ram 2500/3500 5.9L ISB. Built to factory stamping, flange flatness, and depth for correct pickup-to-pan clearance and leak-free sealing when paired with the OE gasket.

Features & Benefits

• Direct-fit OE pan for 5.9L ISB third-gen trucks (no drilling or adapting).
• Correct flange geometry for even clamp load with the OE gasket 3958165.
• Factory drain boss accepts the common M18×1.5 plug (e.g., Cummins 3973071).
• Corrosion-resistant finish and OE rigidity to resist warpage and weeping.
• Genuine Cummins part—traceable quality and fitment.

Verified Fitment (Automotive)

Notes & Overlap: Several catalogs also show usage on 2007.5–2012 6.7L ISB pickups/cab-&-chassis and industrial ISB/QSB variants—confirm by VIN/ESN and pan bolt pattern before ordering.

Specifications

• Type: Stamped steel engine oil pan
• OE Part Number: 3949769
• Gasket: 3958165 (OE composite/rubber style)
• Drain Plug Thread: M18 × 1.5 (typical OE size)
• Quantity Required: 1 per engine

Often Paired With

• Oil pan gasket: Cummins 3958165 (’03–’12 5.9/6.7 coverage)
• Drain plug & washer: Cummins 3973071 (M18×1.5) or magnetic M18×1.5 upgrade
• Pickup tube: Cummins 3949692 (’03–’07 5.9L)
• Pickup tube gasket: Cummins 3949562
• Oil pan bolt kit: Black-phosphate hardware kit (fits 5.9/6.7)

What’s In The Box

• (1) Genuine Cummins Engine Oil Pan (3949769)
• Gasket, bolts, drain plug sold separately.

Installation Tips

• Drop the crossmember/sway bar if needed; thoroughly clean the block rail.
• Install a new 3958165 gasket; follow a criss-cross torque pattern to spec.
• Verify pickup tube O-ring and pickup-to-pan clearance before final torque.
• Refill oil, start, and inspect for leaks after warm-up.

FAQ

WILL THIS FIT MY 2003–2007 5.9L CUMMINS RAM?

Yes—this is the OE pan specified for 2003–2007 Ram 2500/3500 5.9L ISB applications.

DOES THIS ALSO FIT 6.7L (2007.5–2012)?

Many catalogs show overlap on early 6.7L trucks and ISB/QSB engines. Confirm by VIN/ESN and bolt pattern before ordering.

WHAT GASKET AND DRAIN PLUG DOES IT USE?

Use OE gasket 3958165 and an M18×1.5 drain plug such as Cummins 3973071 (or a magnetic M18×1.5 upgrade).

IS THIS PAN STEEL OR ALUMINUM?

OE pan is stamped steel and matches factory depth and flange geometry.

IS THIS A GENUINE CUMMINS PART?

Yes—OE Cummins 3949769.