Product Description
Cummins 4935577 — Genuine Turbo Oil Feed Supply Line for ISB 5.9L/6.7L
MPN: 4935577 | Also Known As: turbo oil feed line, flexible hose | Cross-Refs (ID only): Mopar 68002982AA, 68418331AA; related assembly/fitting numbers commonly seen: 3965717, 3947931, 3972809
Genuine Cummins flexible oil feed hose that supplies pressurized engine oil to the turbocharger. Direct-fit for 2003–2018 Ram 5.9L/6.7L. Replacing aged lines helps prevent oil leaks and turbo failures. Sold individually (1 per engine).
Features & Benefits
- OE routing & end-form for leak-free connection at block and turbo inlet.
- Durable flexible construction to withstand heat, vibration, and pressure.
- Drop-in fit for factory turbo location on ISB platforms.
- Restores reliable oil supply to protect turbo bearings.
- Backed by Cummins fit, function, and quality.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
| 2007.5–2018 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
| 2008–2018 | Ram 6.7L ISB | Ram 4500/5500 Cab & Chassis (verify by VIN/ESN) |
Industrial/Off-Highway: Used on ISB/QSB 6.7 (EPA13+) and some ISB 5.9 industrial variants—verify by ESN for exact build.
Compatibility Notes:
- Line only—fittings and O-rings not included. If reusing fittings, install (2) O-rings 3922794. Many shops replace the 4940183 inlet/outlet fitting at the same time (includes O-rings).
- For 1998.5–2002 trucks, the feed line architecture differs—order the correct pre-2003 line.
- For aftermarket turbo relocations or non-stock turbos, confirm length/routing before purchase.
Specifications
- Type: Flexible turbocharger oil feed line (hose)
- OE Part Number: 4935577
- Cross-References (ID): Mopar 68002982AA, 68418331AA; related: 3965717, 3947931, 3972809
- Quantity Required: 1 per engine (sold individually)
Often Paired With
- Turbo oil inlet/outlet fitting: Cummins 4940183 (includes O-rings)
- Feed line O-rings (if reusing fittings): (2) x 3922794
- Fresh oil & filter: good practice after any turbo oil circuit work
What’s In The Box
- (1) Genuine Cummins Turbo Oil Feed Line (4935577)
- Fittings/O-rings not included (see “Often Paired With”).
Installation Tips
- Replace both O-rings 3922794 or install new 4940183 fitting (includes O-rings).
- Route the hose per OE path; ensure no chafe points or kinks.
- Torque fittings to spec; warm-engine leak check after start-up.
- Prime turbo oil system per service procedure before hard throttle.
FAQ
WILL THIS FIT MY 2003–2018 5.9L/6.7L CUMMINS RAM?
Yes—4935577 is the OE turbo oil feed line for most 2003–2018 Ram 2500/3500 5.9L & 6.7L applications. Always confirm by VIN/ESN.
DOES THIS LINE INCLUDE FITTINGS OR O-RINGS?
No—order fittings separately or reuse yours with (2) O-rings 3922794. Many installers upgrade to 4940183 (includes O-rings).
WILL IT WORK ON RAM 4500/5500?
Common on 2008–2018 Ram 4500/5500 cab & chassis. Verify by VIN/ESN for your specific build.
IS THIS A GENUINE CUMMINS PART?
Yes—OE Cummins hose 4935577 for correct length, ends, and routing.
HOW DO I KNOW MY FEED LINE NEEDS REPLACED?
Oil seepage at crimp/fittings, brittle hose, or contamination after turbo failure are common reasons to replace it.
