Product Description
CUMMINS 5273414 OEM CP3 FUEL PUMP DRIVE GEAR – 5.9L (2003–2007)
Keep your 2003–2007 Dodge Ram 5.9L common-rail running like it should with this genuine Cummins 5273414 CP3 fuel pump drive gear. This OEM gear drives the Bosch CP3 high-pressure fuel pump from the front timing gear train, restoring precise pump timing, quiet operation, and long-term reliability after a pump swap or gear damage. Precision-cut hardened steel teeth maintain correct backlash with the cam and crank gears so your 5.9L ISB delivers consistent rail pressure under towing, performance tuning, or daily-use loads.
Unlike offshore copies, this OEM Cummins gear-fuel pump is engineered to match the original metallurgy, tooth profile, and heat-treat so it runs cleanly in the timing case with minimal noise and wear. It’s a direct drop-in whenever you replace the CP3, freshen a high-mile 5.9L timing set, or convert from a damaged or stripped gear. Pair it with new Cummins sealing components and front gear housing parts so the whole CP3 drive package is leak-free and ready for another hundred thousand miles.
Fitment
Verified automotive fitment for CP3-equipped common-rail trucks:
- 2003–2007 Dodge Ram 2500 5.9L ISB (24V common-rail, Bosch CP3)
- 2003–2007 Dodge Ram 3500 5.9L ISB (24V common-rail, Bosch CP3)
Industrial / off-highway: also used on select ISB6.7/QSB6.7 CP3 applications. Always verify by Engine Serial Number (ESN) in Cummins QuickServe or with your equipment dealer before ordering.
Not for CP4 fuel systems. Some later 6.7L trucks use CP4 pumps with different hardware—confirm by VIN/ESN if you’re working outside the 2003–2007 5.9L Ram range.
Cross-Reference & Related Genuine Cummins Parts
This CP3 drive gear cross-references and works alongside other OEM Cummins timing components. Use these genuine parts to complete your timing gear and CP3 service:
- Cross-ref ID numbers:
- Cummins: 3949359 (gear-fuel pump supersession / ID only)
- Mopar: 5086766AB (OE Chrysler service reference)
- Companion timing gears & housings:
- CUMMINS 5273413 OEM CAMSHAFT GEAR – ISB 5.9L/6.7L (2003–2018) – OEM camshaft drive gear to complement a fresh CP3 gear.
- CUMMINS 3970305 OEM TIMING GEAR HOUSING – ISB 5.9L (2003–2007) – front gear housing for complete 5.9L timing case rebuilds.
- CUMMINS 4935569 OEM TIMING GEAR CASE FRONT COVER (GEAR COVER) – ISB 5.9L/6.7L (2003–2018) – timing gear front cover that seals over the gear set.
- CP3 sealing & alignment hardware:
- CUMMINS 3949688 RECTANGULAR RING SEAL – CP3 GEAR HOUSING 5.9L/6.7L – primary CP3-to-gear-housing seal to prevent fuel and oil leaks.
- CUMMINS 3949326 OEM RING DOWEL – FRONT GEAR HOUSING/CYLINDER BLOCK ALIGNMENT – ISB 5.9L/6.7L – alignment dowel(s) for accurate gear housing location.
- CUMMINS 3937111 OEM FRONT CRANKSHAFT SEAL SERVICE KIT – 5.9L CUMMINS (1989–2007) – front main seal kit often serviced while the timing cover is off.
Specifications for cummins 5273414
| Specification | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 5273414 |
| Component Type | CP3 fuel pump drive gear (gear–fuel pump) |
| GTIN | Not specified by manufacturer |
| UPC | Not specified by manufacturer |
| Cross Reference | Cummins 3949359 (ID only); Mopar 5086766AB (OE service reference) |
| Engine Compatibility | 2003–2007 Dodge Ram 2500/3500 5.9L ISB (24V common-rail, Bosch CP3); select ISB6.7/QSB6.7 industrial CP3 applications (verify by ESN). |
| Location | Front timing gear housing – drives Bosch CP3 high-pressure fuel pump |
| Material | Hardened steel, OEM tooth profile and metallurgy |
| Quantity Required | 1 per engine (sold individually) |
| E-codes / Emissions | Not applicable (mechanical timing gear, no electronic calibration) |
| Shipping Weight | Approx. 1.5 lb (0.68 kg) |
| Package Dimensions | Approx. 4.30 in (W) × 2.50 in (H) × 5.50 in (D) |
| Shipping Info | Ships from CPP Diesel via standard ground parcel; free shipping in the contiguous U.S. |
| Prop 65 Warning | Yes – This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. See www.P65Warnings.ca.gov. |
FAQ
WILL THIS GEAR FIT MY 2003–2007 5.9L CUMMINS RAM?Yes. Cummins 5273414 is the OE CP3 fuel pump drive gear for 2003–2007 Dodge Ram 2500/3500 equipped with the 5.9L ISB common-rail diesel and Bosch CP3 pump. Always confirm by VIN and engine serial number if your truck has been engine-swapped or modified.
DOES THIS GEAR ALSO FIT 6.7L CUMMINS ENGINES?
Some ISB 6.7L / QSB 6.7L CP3 applications use Cummins 5273414 / Mopar 5086766AB. Because coverage varies by year and calibration, verify by ESN in Cummins QuickServe or contact CPP Diesel before ordering for a 6.7L truck or industrial engine. It is not for CP4-equipped fuel systems.
HOW MANY GEARS DO I NEED TO ORDER?
Only one CP3 drive gear is used per engine. This listing includes a single genuine Cummins 5273414 gear; order quantity “1” for one engine unless you are stocking spares.
WHAT ELSE SHOULD I REPLACE WHILE I’M IN THE TIMING GEAR CASE?
At a minimum, inspect and replace the CP3 rectangular ring seal and any leaking front cover or gear housing seals. Many technicians pair this gear with: Cummins 3949688 rectangular ring seal, Cummins 3949326 alignment dowels, Cummins 3970305 timing gear housing, and Cummins 4935569 timing gear front cover as needed for a complete refresh.
IS THIS A GENUINE CUMMINS PART OR AFTERMARKET?
This is a genuine Cummins OEM gear sourced through authorized channels, not an aftermarket copy. That means correct hardness, tooth geometry, and fitment to protect the rest of your timing gear set and CP3 pump.
CAN I REUSE MY OLD CP3 DRIVE GEAR?
If the original gear shows signs of pitting, chipped teeth, fretting on the mounting taper, or damage from a failed pump, it should be replaced. Reusing a compromised gear risks noise, accelerated wear, or pump failure. A new Cummins 5273414 gear is cheap insurance on a CP3 replacement.
