Unlock Honda Dualnote '01
Achieve all 'Silver' ranks in the Domestic A License test.
100% success rate. 

Unlock Jensen Healey Interceptor Mk. III '74
Achieve all 'Gold' ranks in the International B License test.
100% success rate. 

Unlock Mazda RX-8 Concept (Type-II) '04
Achieve all 'Silver' ranks in the International B License test.
100% success rate. 

Unlock Mercury Cougar XR-7 '67
Complete the Super License test.
100% success rate. 

Unlock Nike One 2022
Complete the International B License test.
100% success rate. 

Horsepower Tip
Give your brand new car an oil change as soon as you get it. This will usually gain about 5-30 HP.
100% success rate. 

Unlock Dome Zero
Achieve all 'Gold' ranks in the International A License test.
88% success rate. 

Unlock Ford Model T Tourer
Achieve all 'Gold' ranks in the Super License test.
88% success rate. 

Begin with Extra Credits and Licenses
Have a saved game file from Gran Turismo 3 or Gran Turismo 4 Prologue to begin with extra credits and some of your previously earned licenses.
78% success rate. 

Unlock Honda S500 '63
Achieve all 'Gold' ranks in the Domestic B License test.
67% success rate. 

Unlock Mazda Kusabi '03
Achieve all 'Silver' ranks in the Domestic B License test.
67% success rate. 

Unlock Nismo 270R '94 (S14)
Complete the International A License test.

Unlock Nissan GT-R Concept '01
Achieve all 'Silver' ranks in the International A License test.

Unlock Nissan Skyline GT-R
Achieve all 'Gold' ranks in the Domestic A License test.
0% success rate. 

Unlock Pontiac Solstice Coupe Concept '02
Achieve all 'Silver' ranks in the Super License test.

Unlock Pontiac Sunfire GXP Concept '02
Complete the Domestic A License test.

Unlock Volkswagen Lupo 1.4 '02
Complete the Domestic B License test.

Go to: Gran Turismo 4 Info Page | nGaming Home Page.