Use the following trick to restore the code entry feature. Although codes are not necessary for some cars, other cars (for example, Steel Wheels) are only available with the code. Backup your saved game files on an external memory device (for example, a USB flashdrive). Delete the "Game Data" for the game in your Xross Media Bar browser. This will force the game to revert to v1.50. Disable your internet connection to prevent the game from auto-updating. Restart the game, load the saved game file, and enter the desired sponsor codes. You can now restore your internet connection to patch to the newest update and keep the newly unlocked cars.

Circuit City Hotrod
Enter "circuitcity" as a case-sensitive code in the North American version of the game to unlock the Circuit City Hotrod. Note: You must have a "Burnout Paradise" license to use this car.

Hunter Best Buy Oval Champ car
Enter "bestbuy" as a case-sensitive code in the North American version of the game to unlock the Hunter Best Buy Oval Champ car. Note: You must have an "A" license to use this car.

Kitano GameStop Sport car
Enter "gamestop" as a case-sensitive code in the North American version of the game to unlock the Kitano GameStop Sport car. Note: You must have an "A" license to use this car.

Kitano Micromania Hydros Custom car (European version)
Enter "H211 1Z99 LZ00 00BB" as a case-sensitive code in the French version of the game to unlock the Kitano Micromania Hydros Custom car. Additionally, this code will also work in other European regions besides France if you change your default language for your system to French. Note: You must have an "A" license to use this car. The code contains the number zero and not the letter "O".

Steel Wheels car
Enter "U84D 3Y8K FY8Y 58N6", "E60J 8Z7T MS8L 51U6", "G23X 5K8Q GX2V 04B1", or "E165 6L1Q ZQ2H 10V3" as a case-sensitive code in the North American version of the game to unlock the Steel Wheels car. Enter "Z891 4K88 IN25 79AA" or "B179 8M20 XA09 80FF" as a case-sensitive code in the European or Australian version of the game. Note: You must have a "Burnout Paradise" license to use this car. The code contains the number zero and not the letter "O".

Wal-Mart F1 Racer
Enter "walmart" as a case-sensitive code in the North American version of the game to unlock the Wal-Mart F1 Racer. Note: You must have a "Burnout Paradise" license to use this car.