To find out how many are on *your* specific Windstar, you'll need to:
* Inspect the vehicle: Carefully look at all suspension components (ball joints, tie rod ends, etc.), the steering linkage, and any other moving parts that might have grease zerks (fittings).
* Consult a repair manual: A repair manual specific to a 2003 Ford Windstar will show diagrams illustrating the location of grease fittings.
Don't assume a certain number; physically check your vehicle.