[sahib]

I think all Windstars came with the transverse engine and that would put the water pump on the passenger side of the engine compartment facing the inner fender well. Wouldn't hurt to check all fasteners for tightness as long as you don't over torque, especially when they are threaded into aluminum. Doesn't sound like you're having an oil problem so I wouldn't be to concerned about the "odd" filter. May want to check with the auto store and ask what they sold you. Resetting the code shouldn't hurt either. As long as you note it and if trouble arrises you can relate that to the mechanic if you need to. Doesn't sound like your dealer is going to win any customer appreciation awards anytime soon.