The following are known Action Replay Codes for Cars on Nintendo DS (DS).

These codes are for the European version of the game.

Game ID: ACZP-1824FAF5

Master Code – Must Be On
038078d4 ebafd9ca

Race Codes:

Infinite Turbo
94000130 fffe0000
421e0f7c 02100000
321e0f7c 02400000
b21e0f7c 00000000
00000150 00064000
d2000000 00000000

Drive Through Cars
421e0f7c 02100000
321e0f7c 02400000
b21e0f7c 00000000
94000130 feff0000
200000c8 00000000
d2000000 00000000
421e0f7c 02100000
321e0f7c 02400000
b21e0f7c 00000000
94000130 fdff0000
200000c8 00000004
d2000000 00000000
Press R to activate, L to stop. Disable the code before Pit Stops.

All Minigames & Races Unlocked
021704f4 03030303
021704f8 03030303
021704fc 03030303
02170500 00000700
02170508 00000004
0217050c 00000004
02170518 0000000d
0217051c 0000000d
02170520 0000000d