3967251 Oil Pressure Sensor for Cummins 4B 3.9 ISB QSB B 5.9 Natural Gas Engine
Let us Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I needed a replacement starter for my mower and wasn’t completely sure which one would fit. I sent them a message and they got back to me quickly, asked for my model information, and helped confirm the right part before I ordered. Everything was handled professionally and the communication was great. Very happy with the service.
Kevin C. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Oil Pressure Sensor for Cummins
This oil pressure sensor is a direct replacement component for Cummins 4B 3.9, ISB, QSB, and B 5.9 natural gas engines, monitoring oil pressure to protect the engine from low-pressure damage. It serves as an OEM cross-reference for part number 3967251.
Overview
This oil pressure sensor for Cummins engines measures engine oil pressure and sends a signal to the engine control unit or gauge. It is designed for Cummins 4B 3.9, ISB, QSB, and B 5.9 natural gas engine applications, ensuring accurate pressure readings for safe operation. The sensor for Cummins provides reliable performance in demanding conditions.
Built For Performance
- Direct replacement sensor for Cummins 4B 3.9, ISB, QSB, and B 5.9 natural gas engines
- Electrical thread and connector design for a secure, leak-free fit
- Precision sensing element delivers consistent oil pressure readings
- Built to withstand high vibration and temperature extremes in engine compartments
- OEM cross-reference 3967251 ensures compatibility with original mounting points
Fits These Machines
- for Cummins 4B 3.9 engine
- for Cummins ISB 5.9 engine
- for Cummins QSB 5.9 engine
- for Cummins B 5.9 natural gas engine
On-The-Job Use
- Replacing a faulty sensor that triggers low oil pressure warnings
- Routine maintenance during engine rebuilds or overhaul
- Installing in industrial pumps, generators, and agricultural equipment powered by these Cummins engines
- Diagnosing and resolving oil pressure gauge or warning light issues
Specs At A Glance
| Part Number(s) | 3967251 |
| Compatible Engine Types | 4B 3.9, ISB 5.9, QSB 5.9, B 5.9 natural gas |
| Sensor Type | Oil pressure sender |
Good To Know
Q: How do I know if this oil pressure sensor is the right one for my Cummins engine? A: Verify your engine model and existing sensor part number; this sensor matches OEM 3967251 and covers 4B 3.9, ISB, QSB, and B 5.9 variants. Confirm compatibility with your serial number before ordering.
Q: What are common signs of a failing oil pressure sensor? A: Common signs include erratic oil pressure gauge readings, a warning light that stays on, or a false low-pressure alarm. Replace the sensor promptly to avoid unnecessary engine shutdowns.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.