Product Description

Cummins 4089093 — Genuine Engine Oil Pan (Kit) for B-Series 5.9L

MPN: 4089093  |  Also Known As: oil pan, lower crankcase pan, oil pan kit  |  Cross-Refs (ID): Mopar 04762073, 0508063AA

Refresh your second-gen’s lower end with the genuine Cummins 4089093 oil pan, engineered for 1994–2002 Ram 2500/3500 5.9L (12-valve & 24-valve). Black-coated OE construction for corrosion resistance and factory fit. Some listings include a drain plug; gasket sold separately.

Features & Benefits

• OE geometry & flange flatness for reliable sealing to the block.
• Corrosion-resistant coating to stand up to road debris and salt.
• Direct-fit for 2nd-gen 5.9L (’94–’02); no modifications required.
• Designed for factory dipstick & pickup alignment to protect oiling under load.
• Backed by Cummins quality and materials.

Verified Fitment (Automotive)

Industrial/Off-Highway: Cummins lists this as an Oil Pan Kit used primarily on B-series engines (industrial contexts). Verify by ESN for non-automotive equipment.

Specifications

• Type: Engine oil pan (steel, black-coated)
• OE Part Number: 4089093
• Drain Port: commonly 18 mm thread (verify on vehicle)
• Gasket (sold separately): 4337616 (’89–’02 5.9L)
• Quantity Required: 1 per engine

Often Paired With

• Oil pan gasket: Cummins 4337616 (updated 4-piece design for ’89–’02 5.9L)
• Oil pickup tube: Cummins 3928455 (inspect/replace if damaged)
• Drain plug sealing washer: Cummins 3923096 (replace if marred)

What’s In The Box

• (1) Genuine Cummins Engine Oil Pan (4089093)
• Drain plug may be included on some kits—check contents; gasket sold separately.

Installation Tips

• Support engine as needed; drain oil and remove old pan. Clean mating surfaces thoroughly.
• Install new 4337616 gasket; follow Cummins torque specs in sequence.
• Verify drain plug thread/washer condition; refill oil and check for leaks after warm-up.

FAQ

WILL THIS FIT MY 1994–2002 5.9L CUMMINS RAM?

Yes—this pan targets ’94–’02 5.9L (12V & 24V) Ram 2500/3500 applications.

DOES THE KIT INCLUDE A DRAIN PLUG?

Some retail listings include a drain plug; others sell the pan only. Check the contents on your specific listing before purchase.

WHAT GASKET DO I NEED?

Use Cummins 4337616 oil pan gasket (’89–’02 5.9L). Replace the drain plug washer 3923096 if worn.

WHAT SIZE IS THE DRAIN PLUG?

Many pans use an M18 x 1.5 plug, but some factory pans used a larger size. Verify your existing plug before reusing a magnetic/quick-drain valve.

DOES THIS FIT 2003+ COMMON-RAIL TRUCKS?

No—the 2003–2007 5.9L common-rail pan uses a different bolt pattern; this pan is for ’94–’02.