Product Description
Cummins 5273414 — Genuine CP3 Fuel Pump Drive Gear for 5.9L ISB
MPN: 5273414 | Also Known As: CP3 fuel pump gear, injection pump gear | Cross-Refs (ID): 3949359 (Cummins), 5086766AB (Mopar)
Genuine Cummins drive gear for the Bosch CP3 high-pressure fuel pump. Direct-fit for 2003–2007 5.9L common-rail Ram. Precision-cut hardened steel for accurate pump drive and long service life. Sold individually (1 per engine).
Features & Benefits
- OE metallurgy & tooth profile for quiet, reliable gear-train operation.
- Direct-fit replacement for CP3-equipped 5.9L ISB (2003–2007).
- Hardened steel construction resists wear under high load.
- Restores proper pump drive after gear damage or CP3 service.
- Backed by Cummins for fit, function, and durability.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail, CP3) | Ram 2500/3500 |
Industrial/Off-Highway: Used on select ISB6.7/QSB6.7 (EPA10) CP3 applications—verify by Engine Serial Number (ESN) before ordering.
Compatibility Notes:
- This listing targets 2003–2007 5.9L common-rail pickups. Some 6.7L CP3 applications use Mopar 5086766AB / Cummins 5273414—always confirm by VIN/ESN, especially on later model years.
- Not applicable to CP4-equipped model years.
Specifications
- Type: CP3 injection pump drive gear
- OE Part Number: 5273414
- Cross-References (ID): 3949359 (Cummins), 5086766AB (Mopar)
- Location: Timing gear housing (drives CP3 pump)
- Quantity Required: 1 per engine (sold individually)
- Material: Hardened steel
Often Paired With
- Access cover & seal: Cummins 4935281 (cover), 3946689 (seal)
- Service tool: Gear puller for VE/P7100/VP44/CP3 (e.g., XD134)
- New CP3 mounting hardware/lock washer: replace if worn or distorted
What’s In The Box
- (1) Genuine Cummins CP3 Pump Drive Gear (5273414)
- Gaskets/hardware sold separately (see “Often Paired With”).
Installation Tips
- Follow Cummins service procedures; support/lock the pump shaft—do not pry on gear teeth.
- Clean mating surfaces; use new access-cover seal; torque fasteners to factory spec.
- Prime the fuel system and verify for leaks after reassembly.
FAQ
WILL THIS FIT MY 2003–2007 5.9L CUMMINS RAM?
Yes—this is the OE CP3 pump drive gear for 2003–2007 5.9L common-rail Ram 2500/3500 (confirm by VIN/ESN).
DOES THIS GEAR FIT 6.7L TRUCKS?
Some 6.7L CP3 applications use the same gear (Mopar 5086766AB/Cummins 5273414). Because catalogs differ by year/engine calibration, verify by VIN/ESN. Not for CP4-equipped years.
HOW MANY GEARS DO I NEED?
Just one—this drives the CP3 pump. It’s sold individually (1 per engine).
WHAT ELSE SHOULD I REPLACE DURING THE JOB?
Replace the access-cover seal (3946689) and inspect the cover (4935281). Use fresh hardware/lock washer as needed and a proper gear puller for removal.
IS THE CP3 “TIMED” TO THE ENGINE?
On ISB common-rail, the CP3 pump itself isn’t cam-timed like earlier P-pump setups, but you should still follow factory procedures to avoid gear-train misalignment and ensure correct torque.
IS THIS A GENUINE CUMMINS PART?
Yes—OE Cummins part 5273414 for proper fit and durability.
