* 3.8L V6: This was the most common engine.
* 3.0L V6: A less common, but still available option.
There wasn't a choice of different sized motors within a single trim level; the engine size was a choice made when purchasing the vehicle new. To know for sure which engine is in a *specific* 2003 Windstar, you'd need to check the vehicle's documentation (owner's manual) or the vehicle identification number (VIN). The VIN can be used to look up the specifications.
