Product Description
Cummins 5273413 — Genuine Camshaft Drive Gear for ISB 5.9L & 6.7L
MPN: 5273413 | Also Known As: cam gear, camshaft drive gear | Cross-Refs (ID only): 3949358, 3965391, 5273732
Genuine Cummins camshaft drive gear that synchronizes the camshaft with the crankshaft for precise valve timing on ISB platforms. Direct-fit for 2003–2018 Ram 5.9L/6.7L common-rail applications. Built to OEM spec for tooth profile, hardness, and durability.
Features & Benefits
- OE tooth geometry & hardness for quiet operation and accurate timing.
- Direct-fit replacement for ISB 5.9L (CR) and 6.7L applications.
- Maintains valve-train accuracy to protect power, efficiency, and emissions.
- Precision-machined steel for long service life.
- Backed by Cummins for fit, function, and reliability.
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 |
Industrial/Off-Highway: ISB6.7/QSB6.7 (EPA13 era and others)—verify by ESN before ordering.
Compatibility Notes:
- Retailers list this gear for 2003–2018 5.9L/6.7L Ram. Cummins’ catalog notes primary use on EPA13 6.7 ISB/QSB; for late-year trucks, confirm by VIN/ESN due to running changes.
- Not used on 1989–2002 non-common-rail 5.9L (12V/VP44) without custom build changes.
Specifications
- Type: Camshaft drive gear
- OE Part Number: 5273413
- Cross-References (identification): 3949358, 3965391, 5273732
- Material: Hardened steel (OE spec)
- Quantity: 1 per engine (sold individually)
Often Paired With
- Camshaft key: 3902332 (keys the gear to the cam)
- Camshaft thrust plate/retainer: 3944001
- Crankshaft drive gear: 5273412 (mates with cam gear)
What’s In The Box
- (1) Genuine Cummins Camshaft Gear (5273413)
- Keys/retainers sold separately (see “Often Paired With”).
Installation Tips
- Inspect the cam nose and keyway; replace the key if worn.
- Follow OEM torque and timing procedures; verify timing marks after install.
- Check thrust plate wear and end-play; replace if out of spec.
FAQ
WILL THIS CAM GEAR FIT MY 2003–2018 RAM 5.9L/6.7L?
Yes—this is the OE camshaft gear widely listed for 2003–2018 5.9L/6.7L Cummins Ram applications. For late years or engine swaps, confirm by VIN/ESN.
IS THIS A GENUINE CUMMINS PART?
Yes—OE Cummins part number 5273413.
WHAT OTHER PARTS SHOULD I REPLACE WITH THE GEAR?
Commonly replaced items include the camshaft key (3902332), the thrust plate/retainer (3944001), and inspecting the crankshaft gear (often 5273412) for wear.
DOES THIS WORK ON 12-VALVE OR VP44 (1994–2002) ENGINES?
It’s intended for common-rail platforms (2003+). Earlier engines may use different gear part numbers.
HOW DO I CONFIRM FITMENT?
Use your VIN/ESN to verify in Cummins QuickServe or contact us; industrial ISB/QSB usage can vary by calibration and build date.
