Gran Turismo 5 Cheats - GT5 Cheats

Here's the full list of cheats for Gran Turismo 5, last updated in January 2011.
Cheats - Unlock machines
We must get some medals to unlock the corresponding equipment. S for Standard Cars, P for Premium Cars.
Daihatsu OFC-1 Concept '07 (P) - Silver medal in the tests of license B.
Mazda Atenza Concept '01 (S) - Silver medal in the tests of license A.
Mazda Demio Sport '03 (S) - Bronze medal in the tests of license B.
Nissan mm-R Cup Car '01 (S) - Bronze medal in the tests of license A.
TommyKaira ZZ-S '00 (S) - Gold Medals in the tests of license B.
Cheats - Unlock events
You're going to unlock new races to reach certain levels in the game.
Gran Turismo Karting Experience - You must reach level 01
Jeff Gordon NASCAR School - You must reach level 02
Top Gear Test Track - You must reach level 04
AMG Driving Academy - You must reach level 06
Gran Turismo Rally - Reach Level 10
Grand Tour - You must reach level 13
Sebastien Loeb Rally Challenge - You must reach level 16
Endurance Series - You must reach level 25
Sebastian Vettel Challenge - You must reach level 30