Description
PAI 350609 low-pressure sensor replacing Caterpillar 161-9927 (and predecessors 141-4120, 121-2728, 3E6379) used across Cat 3406E, C-10, C-12 truck engines and 3126/3176B/3176C/3196/3456 industrial engines. Cat lists 161-9927 as a Pressure Sensor in their parts catalog; the unit is the standard low-pressure transducer for engine oil, fuel, or air pressure circuits depending on chassis position.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 350609 |
| Part Type | Pressure Sensor (low-pressure) |
| Engine Compatibility | Caterpillar 3406E, C-10, C-12 truck engines; 3126 / 3176B / 3176C / 3196 / 3456 industrial engines |
Cross References
This part replaces or is equivalent to the following part numbers:
- Caterpillar: 161-9927 / 1619927, 141-4120 / 1414120, 121-2728 / 1212728, 3E6379, 3E-6379
Applications
This pressure sensor fits the following engines:
- Caterpillar 3406E (1993-2003)
- Caterpillar C-10 / C-12 (1995-2003)
- Caterpillar 3126 / 3126B (1997-2003)
- Caterpillar 3176B / 3176C (1993-2002)
- Caterpillar 3196 / 3456 industrial
Representative vehicles and equipment using these engines:
- Class 8 trucks with Cat 3406E / C-10 / C-12 (Freightliner Classic/FLD, Peterbilt 379, Kenworth T800/W900, Sterling, Western Star)
- Cat 345B / 365B excavators and other heavy equipment with 3176C / 3196
Verify your engine serial number and configuration before ordering to confirm fitment. Do not extend to C15 ACERT, C16, C18, or C9 without verification.









