The oil pressure sensor on a 5.7 L Hemi is typically mounted on the rear of the engine block, near the firewall, and connected by a small two‑pin electrical connector. This location is the standard reference point, though some model years place the sensor closer to the oil filter housing or along the timing cover.
Common locations on the 5.7 L Hemi
The following spots cover the most frequently encountered placements across different model years and configurations. Use these as a starting point when you’re diagnosing low oil pressure or locating the sensor for a replacement.
- Back of the engine block on the side toward the firewall, typically near the cylinder head, with a two‑ or three‑pin electrical connector.
- Near the oil filter housing on the side of the engine, which is closer to the front of the vehicle in some layouts.
- Along the timing cover area or just behind the intake manifold in certain years where the sensor is tucked toward the back of the engine.
Locating the sensor can be tricky because clearance and engine bay layout vary by year and model (Ram, Challenger, Charger, Grand Cherokee, etc.). If you don’t see it in the above spots, consult the vehicle’s service manual or a wiring diagram for the exact year/trim, which will confirm the sensor’s location and thread size.
How to verify the exact location on your vehicle
To confirm the precise position for your 5.7 L Hemi, follow these practical steps that apply across most configurations. They help ensure you’re identifying the correct oil pressure sending unit rather than another sensor in the vicinity.
- With the hood open and the engine cool, visually scan the engine block from the front toward the rear, focusing on the block surface near the head and around the oil filter area.
- Look for a small cylindrical or nut‑shaped sensor with a wire harness or connector terminating in a two‑ or three‑pin plug.
- Check near common reference points: the rear of the block by the firewall, or along the oil filter housing if the sensor is positioned toward the front side of the engine.
- When in doubt, remove your vehicle’s service manual diagram or a reputable online diagram for the exact year, as the location can shift slightly between model years.
Verifying the sensor’s location before attempting removal helps prevent damage to wiring or threads and makes sure you’re addressing the correct component if you’re diagnosing oil pressure issues.
Notes for safety and maintenance
Always disconnect the battery and allow the engine to cool before touching sensors or wiring. Oil can be hot and pressurized, and misidentifying the sensor could lead to leaks or electrical shorts. If you’re replacing the sensor, use the correct thread sealant or Teflon tape if specified by the service manual, and torque to the manufacturer’s specification.
Summary
In most 5.7 L Hemi engines, the oil pressure sensor is located on the rear of the engine block near the firewall, with a small two‑pin connector. Some years place the unit near the oil filter housing or along the timing cover. Use the described locations as a starting point, and verify with the vehicle’s manual or a wiring diagram for your exact year and configuration. If a fault is suspected, consult a mechanic or dealership for precise identification and replacement procedures.