Impreza WRX STI F4-2.5L DOHC Turbo (2007)
2. Check the position of pedal pad.
Pedal height L: 148 mm (5.83 inch)
Brake pedal free play 0.5 - 2.0 mm (0. 02 - 0.08 inch) [Depress brake pedal pad with a force of less than 10 Nm (1 kgf, 2 ft. lbs.).]
3. If it is not within specified value, adjust it by adjusting the brake booster operating rod length.