Product Description
CUMMINS 3975628 OEM ENGINE BLOCK HEATER ELEMENT – RAM 5.9L/6.7L (1998.5–2021)
The genuine CUMMINS 3975628 OEM engine block heater element is the factory heating element installed in millions of 5.9L and 6.7L Cummins-powered Ram trucks and industrial engines. This heater threads directly into the engine block, warming your coolant to promote easier cold starts, quicker cabin heat, smoother idle, and reduced engine wear in freezing temperatures. If your block heater has failed, shorted, or never came installed from the factory, this real Cummins replacement restores proper OEM operation and winter reliability.
Built to Cummins specifications for proper wattage, sealing, and heat distribution, the 3975628 element is compatible with a wide range of ISB engines from 1998.5 through 2021. Pair it with the correct OEM power cord for a complete installation. This is the same heating element used in factory-equipped cold weather packages.
Key Features
- Genuine Cummins OEM element – correct wattage and thread fitment.
- Improves cold-weather starting and reduces engine stress.
- Direct-fit replacement for 5.9L & 6.7L Cummins from 1998.5–2021.
- Compatible with OEM heater cords using the factory-style plug connection.
- Essential for harsh winter climates and long engine life.
Fitment Details
- Engines: 5.9L Cummins ISB (1998.5–2007), 6.7L Cummins ISB (2007.5–2021)
- Applications: Dodge/Ram 2500, 3500, 4500, 5500
- Industrial Fitment: Various ISB/ISC/industrial B-series engines
- Notes: Cord sold separately; some trucks may have a factory-installed cord routed behind the bumper.
Cross-Reference & Companion Cummins Parts
CPP Diesel carries several Cummins parts commonly replaced or paired with the 3975628 heater element:
- CUMMINS 3165153 ENGINE BLOCK HEATER POWER CORD – plugs directly into the 3975628 heater element.
- CUMMINS 2893262 UPDATED HEATER CORD – later-style power cord for many ISB engines.
- VIEW ALL GENUINE CUMMINS PARTS
Common Cummins related/cross-reference numbers: 3975628, 3945449, 3949692, 3969987 (verify via VIN/ESN for industrial variants).
Installation Notes
- Element threads into the block on the passenger side (varies slightly by model year).
- Torque to Cummins specifications to avoid leaks.
- Always inspect or replace the heater cord if damaged or corroded.
- Test operation before reassembly in cold climates.
Specifications for cummins 3975628
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 3975628 |
| Related / Superseded | 3945449, 3949692, 3969987 (verify by VIN/ESN) |
| Function | Electric engine block heater element |
| Engine Compatibility | 5.9L & 6.7L Cummins ISB (1998.5–2021) |
| Vehicle Fitment | Ram 2500 / 3500 / 4500 / 5500 |
| UPC | 190910289217 |
| GTIN | 190910289217 |
| Shipping Weight | Approx. 0.85 lb |
| Shipping Method | Standard ground; expedited available |
| E-Codes / Emissions | Not emissions related |
| Prop 65 Warning | WARNING: This product may expose you to chemicals known to the State of California to cause cancer and reproductive harm. Visit www.P65Warnings.ca.gov. |
| Country of Origin | As labeled by Cummins (varies by batch) |
Frequently Asked Questions
WILL THIS FIT BOTH 5.9L AND 6.7L CUMMINS ENGINES?
Yes. The CUMMINS 3975628 heater element is used across 5.9L (1998.5–2007) and 6.7L (2007.5–2021) ISB engines. Always confirm by VIN/ESN.
WHAT POWER CORD DOES THIS HEATER USE?
Most applications use either the CUMMINS 3165153 or the CUMMINS 2893262 power cord. Check your vehicle for the matching style.
HOW DO I KNOW IF MY TRUCK ALREADY HAS A BLOCK HEATER?
Most 5.9L and 6.7L engines came with the heater element already installed, but many were shipped without the power cord. Inspect the passenger side of the block for an electrical socket.
CAN A FAILED HEATER AFFECT COLD STARTING?
Yes. A worn or burned-out heater greatly increases strain on the starter, batteries, and engine components in cold weather.
IS THIS A GENUINE CUMMINS PART?
Yes. CPP Diesel supplies only authentic Cummins OEM components for maximum durability and reliability.
