: General save editors, such as the one found on GitHub , typically allow you to modify your cash and bounty. While some may not have a single "unlock all" button for cars, having unlimited money allows you to purchase any car once it's visible in the shop.
: This is the most effective tool for this specific purpose. It includes an "UnlockAllThings" feature (typically activated by pressing nfs most wanted save editor unlock all cars
Max out your cash and bounty to avoid race requirements. : General save editors, such as the one