Unlocking cars via a Save Editor usually adds them to the "My Cars" (Quick Race) menu. To get them in Career Mode , you may need to use the "Buyable Cars" hack within the editor so they show up at the Car Lot for $0.
If you're interested in learning more about Need for Speed: Most Wanted or save editors, here are some additional resources: nfs most wanted save editor unlock all cars
The Need for Speed: Most Wanted (2005) save editor is a third-party PC tool that modifies career progression files, granting instant access to content that normally requires dozens of hours of gameplay. Its flagship feature, , bypasses the Blacklist ranking system, allowing players to drive every vehicle—from the starter Golf GTI to the legendary BMW M3 GTR—without defeating Razor’s crew. Unlocking cars via a Save Editor usually adds