Where is the oxygen sensor on a 2003 Chrysler van?

The location of the oxygen sensor(s) on a 2003 Chrysler van depends on the engine type. There are typically several oxygen sensors, one or more upstream (before the catalytic converter) and one or more downstream (after the catalytic converter).

To find the location, you'll need to:

1. Identify your engine: Check your vehicle's documentation (owner's manual or a sticker under the hood) to determine the exact engine type (e.g., 3.3L, 3.8L).

2. Consult a repair manual: A repair manual specific to your 2003 Chrysler van and engine will show you the exact location of the oxygen sensors with diagrams. You can find these online (e.g., Chilton, Haynes) or at auto parts stores.

3. Use an online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, Napa Auto Parts) allow you to enter your vehicle's information and view diagrams showing the location of parts, including oxygen sensors.

General Location Hints (but not guaranteed for all models):

Oxygen sensors are usually located in the exhaust manifold or the exhaust pipe, close to the engine. Upstream sensors are closer to the engine than downstream sensors. They are threaded into the exhaust system.

Important Note: Without knowing the precise engine type in your 2003 Chrysler van, I cannot give you a definitive location. Using the resources above is crucial to avoid damaging other parts of your vehicle's exhaust system.