complete strut swap?

For a 2003 Mazda MPV, struts designed for a 3.0L or 2.5L engine might not be directly compatible with a 2.3L engine because the ride height might be different. If the struts look the same I would give it a try. Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car.

https://www.2carpros.com/articles/how-to-replace-a-suspension-strut-and-spring

Check out the images (below). Please let us know what happens.