Released in 2005, NFSMW was designed for older hardware and display technologies. As a result, the game's default aspect ratio is limited to 4:3, which can be quite restrictive for modern widescreen monitors. This can lead to a less-than-ideal gaming experience, with black bars on either side of the screen and a cramped field of view.
Beyond just changing the resolution, the fix includes several quality-of-life upgrades: nfsmw widescreen fix