Why does RayIntersect return wrong values?

Question

I'm trying to implement Object picking. My BasicModel.cs has a function:

public bool CheckRayIntersection(Ray ray)
    {
        //Where aabb is the BasicModel's BoundingBox
        if (ray.Intersects(aabb) != null)
        { return true; }
        else
        {

            return false;
        }
    }

I create the Ray in my Camera.cs

public Ray GetMouseRay(Vector2 mousePosition, Viewport viewport)
    {
        Vector3 near = new Vector3(mousePosition, 0);
        Vector3 far = new Vector3(mousePosition, 1);

        near = viewport.Unproject(near, projection, view, Matrix.Identity);
        far = viewport.Unproject(far, projection, view, Matrix.Identity);

        return new Ray(near, Vector3.Normalize(far - near));
    }

And finally in game1.cs I check for Intersection in every BasicModel and write "Intersects" to Console.

foreach(BasicModel model in assetManager._modelsOnscreen)
                {
                    if(model.CheckRayIntersection(camera.GetMouseRay(mouseLocation,viewport)))
                    {
                        winForm.ConsoleWrite = "intersects";
                    }
                }

Somehow it always returns true for intersection with offset (to the right) to the actual Boundingbox. I also don't have any clue how I could visualize the problem or step through it.

Any advice is welcome, BC++