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Cummins 3974092 is the common rail pressure sensor with a stainless threaded port and three pin plug. It is used on Cummins ISB, ISL and QSB engines. This aftermarket version has the same mounting and electrical connector as the original, so it plugs in and bolts on where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Fuel Rail Pressure Sensor |
| Replaces | Cummins 3974092 |
| Sensor type | Common rail fuel pressure sensor |
| Connector | Three pin plug |
| Fits | Cummins ISB, ISBe4, ISL, ISL9, QSB5.9, QSC8.3 and QSL9 engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 903289 |
| Country of Manufacture | China |
Cummins machines
Check the part number on your old unit before ordering.
| Cummins Part No.(SPM Part No.) | Fits |
|---|---|
| 3974092(SPM-HEP-4156) | Cummins ISB, ISBe4, ISL, ISL9, QSB5.9, QSC8.3 and QSL9 engines |
Wrong or missing reading
A failed sensor gives a dead or false gauge reading or a warning light.
Fault codes
Check the wiring and plug first; if the sensor itself reads out of range, replace it.
Corrosion
Connectors on machines take water and dirt. A corroded sensor is cheaper to replace than to chase.
Fleet spares
Common sensors are worth keeping in stock for each machine type.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (4 aftermarket sellers) | USD 42.00 to 51.07 | 25 Oct 2026 |
| FridayParts | USD 51.45 | 24 Oct 2026 |
| Amazon (VehiclePro) | USD 67.50 | 24 Oct 2026 |
| KuduParts | USD 92.00 | 24 Oct 2026 |
| Spare Part Mart | USD 41.16 | Today |
Our price of USD 41.16 is 2% to 55% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
No. It is an aftermarket part made to fit in place of Cummins 3974092. It is not made by or affiliated with Cummins; the Cummins part number is used only to show what it replaces.
It fits Cummins ISB, ISBe4, ISL, ISL9, QSB5.9, QSC8.3 and QSL9 engines. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It has the same mounting and electrical connector as the original. Check the plug and terminals match your old part, and test it before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
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Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
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