To be certain:
* Consult a repair manual: A Haynes or Chilton manual specific to your 1994 Dodge Spirit 2.5L will show you the exact location with a diagram. This is the most reliable method.
* Check online diagrams: Websites like AutoZone, Advance Auto Parts, or others that provide vehicle-specific repair information might have diagrams showing sensor placement. Search for your specific year, make, model, and engine.
* Look under the car: With the engine cool, carefully look underneath the vehicle near the exhaust manifold. The oxygen sensor is usually a threaded cylindrical component with a wire harness connected to it. However, be cautious as exhaust components get very hot.
Caution: Exhaust components get extremely hot. Allow the engine to cool completely before attempting to locate or work on any part of the exhaust system.