Product Description
Restore accurate boost and fueling control on your third-gen Ram with the genuine CUMMINS 3971106 OEM MAP (MANIFOLD ABSOLUTE PRESSURE) SENSOR. This direct-fit sensor mounts in the intake manifold of 2003–2007 5.9L Cummins trucks and sends precise pressure data to the ECM so it can adjust fuel and turbo output for clean power, smooth drivability, and proper smoke control. If you're chasing low power, erratic boost, or MAP sensor codes, this is the OE solution Cummins engineered for your ISB.
Unlike cheap knock-offs, this factory Cummins 3971106 MAP sensor delivers stable readings, correct connector indexing, and long service life. It is an ideal replacement whenever you tune, upgrade turbos, or are troubleshooting overboost/underboost and drivability issues on a 5.9L common-rail truck.
Key Features & Benefits
- Genuine Cummins 3971106 MAP sensor – not an aftermarket copy.
- Restores accurate manifold pressure/boost data to the ECM.
- Helps fix low power, derate, surging, and excessive smoke caused by a failed MAP sensor.
- Direct-fit replacement with OE three-pin connector for 2003–2007 5.9L Cummins.
- Engineered for long service life and stable readings in harsh diesel conditions.
Fitment
This genuine Cummins MAP sensor is designed for the following applications:
- 2003–2007 Dodge Ram 2500 5.9L Cummins (24V common-rail ISB)
- 2003–2007 Dodge Ram 3500 5.9L Cummins (24V common-rail ISB)
Position: Intake manifold (manifold absolute pressure/boost sensor).
Connector: 3-pin OE-style plug.
Always confirm by VIN or engine serial number (ESN) if you are unsure.
When To Replace Your MAP Sensor
- Frequent MAP-related DTCs (such as P0106, P0107, P0108).
- Erratic or low boost readings on your monitor.
- Poor fuel economy, excessive smoke, or derate/limp conditions.
- After long-term oil contamination, EGR/soot buildup, or wiring repair.
Cross-Reference (ID Only)
- Cummins: 3971106 (this part)
- Cummins (superseded/related): 4088007
- Mopar service number: 5139278AA (Ram dealer reference)
Cross-reference numbers are provided for identification only. Always verify physical configuration and ESN before ordering.
Related Genuine Cummins Parts (Same Engine Family)
Pair this MAP sensor with other genuine Cummins components to keep your 5.9L ISB sealed and reliable:
- CUMMINS 3920706 OEM EXPANSION PLUG (TURBO DRAIN) – RAM 5.9L/6.7L (1989–2018)
- CUMMINS 3946495 OEM HARMONIC BALANCER DOWEL PIN – RAM 5.9L/6.7L (2003–2018)
- CUMMINS 3804899 OEM FRONT CRANKSHAFT SEAL – RAM 5.9L/6.7L (2003–2018)
- CUMMINS 3937111 FRONT CRANKSHAFT SEAL SERVICE KIT – 5.9L CUMMINS (1989–2007)
Installation Notes
- Disconnect batteries before unplugging sensors or working near the engine harness.
- Use care when releasing the OE connector lock to avoid broken tabs.
- Inspect the MAP port and O-ring sealing surface for carbon or oil buildup; clean as needed.
- Lightly oil the O-ring, install sensor squarely, and torque to OEM spec.
- Clear stored DTCs and verify proper boost readings with a scan tool or monitor.
Specifications for cummins 3971106
| Specification | Detail |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 3971106 |
| Sensor Type | Manifold Absolute Pressure (MAP) / Boost Sensor |
| Engine Compatibility | 2003–2007 Ram 2500/3500 with 5.9L ISB Cummins (24V common-rail) |
| Fuel Type | Diesel |
| Connector | OE 3-pin weather-sealed connector |
| GTIN | Not specified by Cummins (no GTIN published in available data) |
| UPC | Not specified by Cummins (no UPC published in available data) |
| Shipping Weight | Approx. 1.0 lb |
| Shipping Dimensions (L × W × H) | 3 in × 3 in × 2 in (approximate boxed size) |
| Shipping Method | Ships via standard ground/small parcel from CPP Diesel |
| Cross Reference (ID Only) | Cummins 3971106; Cummins 4088007 (superseded); Mopar 5139278AA (service number) |
| E-Codes / Emissions | Not specified; OE emissions-calibrated sensor |
| Prop 65 Warning | Yes – This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. |
FAQ
WILL THIS CUMMINS 3971106 MAP SENSOR FIT MY 2003–2007 5.9L CUMMINS RAM?
Yes. Cummins 3971106 is the OE MAP (manifold absolute pressure) sensor for most 2003–2007 Dodge Ram 2500/3500 trucks with the 5.9L ISB common-rail engine. Because there are VIN/ESN-based exceptions, CPP Diesel always recommends confirming with your engine serial number if you are unsure.
WHAT SYMPTOMS POINT TO A FAILING MAP SENSOR ON A 5.9L CUMMINS?
Common symptoms include low power, surging, excessive smoke, poor fuel mileage, erratic boost readings, and check engine lights with MAP-related codes such as P0106, P0107, or P0108. A contaminated or failed MAP sensor sends incorrect pressure data to the ECM, which then mismanages fueling and turbo control.
IS THIS A GENUINE CUMMINS SENSOR OR AFTERMARKET?
This listing is for a genuine Cummins OEM 3971106 MAP sensor. It is the same style sensor you would receive through a Cummins or dealer parts counter, with OE calibration, connector, and quality control.
DO I NEED TO REPROGRAM MY TRUCK AFTER INSTALLING THIS MAP SENSOR?
No special tuning or programming is normally required when installing a stock-replacement Cummins 3971106 MAP sensor. After installation, clear any stored trouble codes and verify proper boost readings with a scan tool or monitor. If you have custom tuning, follow your tuner’s recommendations.
WHAT OTHER CUMMINS PARTS SHOULD I REPLACE WHILE SERVICING MY 5.9L?
When solving drivability or oil leak issues on a third-gen Cummins, many owners also address engine sealing and rotating components using genuine Cummins parts such as the 3804899 front crankshaft seal , 3946495 harmonic balancer dowel pin , and 3920706 turbo drain expansion plug . CPP Diesel stocks a full line of Cummins genuine parts to keep your ISB running strong.
