Product Description
Cummins 5265108 — Crankcase Breather Vent Tube (Large Hose)
MPN: 5265108 | Also Known As: CCV vent hose, breather tube (large) | Related: 5265106 (small hose), 3957987 (breather assembly)
Why This Part
- ✓ OE molded hose for proper crankcase ventilation on 5.9L ISB.
- ✓ Direct-fit for 2003–2005 Ram 5.9L (large hose on the breather).
- ✓ Restores CCV function—replaces cracked or brittle factory tubing.
- ✓ Durable OE material with correct bends and diameter.
Quick Specs
| Type | Crankcase breather vent tube (large hose) |
|---|---|
| OE Part # | 5265108 |
| Qty Required | 1 per engine (sold individually) |
| Pair With | 3957987 (breather/CCV filter housing), 5265106 (small drain/vent hose), clamps as needed |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2005 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
Notes: This is the large hose on the crankcase breather assembly. For the smaller hose, use 5265106. Industrial applications may vary; verify by ESN.
Often Paired With
- Crankcase Breather/Filter Assembly: Cummins 3957987 (’03–’05 5.9L)
- Small Breather Hose: Cummins 5265106 (’03–’05 5.9L)
- New clamps (as required)
What’s In The Box
- (1) Genuine Cummins Crankcase Breather Vent Tube — Large (5265108)
- Breather assembly, small hose, and clamps sold separately.
Install Tips
- Match routing to factory path; avoid kinks or tight bends.
- Inspect breather assembly for clogging; replace if needed.
- Secure with proper clamps; recheck after heat cycle.
FAQ
WILL THIS FIT MY 2003–2005 5.9L CUMMINS RAM?Yes—this is the large hose on the crankcase breather for 2003–2005 5.9L ISB Ram 2500/3500 (verify by VIN/ESN).
WHAT’S THE DIFFERENCE BETWEEN 5265108 AND 5265106?5265108 is the large vent hose. 5265106 is the smaller breather hose used on the same assembly.
DOES THIS INCLUDE CLAMPS OR THE BREATHER ASSEMBLY?No—this listing is the large hose only. Pair with 3957987 (breather/CCV filter) and clamps if needed.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 5265108 with factory geometry and materials.
HOW DO I KNOW MY HOSE NEEDS REPLACEMENT?Look for hardening, cracks, oil residue around joints, or visible splits; replace immediately to maintain proper CCV function.
