Overview
The Crown Automotive J3212004 is an oil pressure sender unit for 1972 to 1985 SJ Full Size and J-series trucks with 4.2L, 5.9L or 6.6L engines. An oil pressure sender reads engine oil pressure and passes that reading to the dashboard oil pressure gauge.
Crown Automotive makes and distributes replacement parts for Jeep vehicles. The vehicle statement for this sender is covered under Vehicle fitment below.
Key features
- Oil pressure sender unit for reading engine oil pressure at the dashboard gauge
- Fits 1972 to 1985 SJ Full Size and J-series trucks with 4.2L, 5.9L or 6.6L engines
- Vehicle statement names 4.2L, 5.9L and 6.6L engines
- Crown Automotive catalog item J3212004 with UPC 848399059472
Oil pressure sender basics
An oil pressure sender sits in the engine block and reads oil pressure, passing the reading to the dashboard gauge or warning light. Because it works in hot, oily conditions, it can corrode or drift over many years, and a worn sender may show a reading that does not match actual pressure. Testing before replacing helps avoid unnecessary parts.
Older trucks often use sending units with simple wiring, so a clean connection and a solid ground matter as much as the unit itself. Use a mechanical test gauge to confirm pressure, then compare the reading with the dash gauge. If the readings differ, the sender or its wiring is the likely cause.
- Test with a mechanical gauge before replacing
- Clean and tighten the wire connector
- Check the ground connection at the engine
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J3212004 |
| UPC | 848399059472 |
| Part type | Oil pressure sender unit |
| Engine sizes (vehicle statement) | 4.2L, 5.9L, 6.6L |
| Engine sizes (engine table) | 2.5, 4.0, 4.2, 5.0, 6.6 |
Vehicle fitment
Fit is for 1972 to 1985 SJ Full Size and J-series trucks with 4.2L, 5.9L or 6.6L engines. Confirm your year, model and trim before ordering.
Model years outside 1972 to 1985 fall outside this fit. The 2.5, 4.0 and 5.0 engine sizes need a separate fit check before ordering. Confirm your vehicle’s year, model and trim before ordering.
What’s included
Confirm the package contents before ordering so fittings and wiring match your installation.
