If the error persists, your save file may be irreversibly corrupted. In that case:

Many older editors are "broken" on modern operating systems. Ensure you are using a reputable tool like the or the NFS-VltEd tool. Open the editor and load your profile. Navigate to the "Garage" or "Cars" section. Locate the specific car causing the issue. Manually set the Heat Value to 1.00 . 3. The "Stock Car" Reset