| RS, RS sport package, OUTBACK | WRX | STi |
| Whole system | Minimum turning radius | M (ft) | 5.4 (17.7) | 5.7 (18.7) |
| Steering angle (Inside-Outside) | 34.5° - 30.3° | 32.9° - 28.5° |
| Steering wheel diameter | Mm (in) | 385 (15.16) | 375 (14.76) |
| Overall gear ratio (Turns, lock to lock Gear box) | 3.0 | 2.7 | 2.6 |
| Gearbox | Type | Rack and pinion, Integral |
| Backlash | 0 (Automatically adjustable) |
| Valve (Power steering system) | Rotary valve |
| Pump (Power steering system) | Type | Vane pump |
| Oil tank | Installed on body |
| Output | Cm 3 (cu in)/rev. | 7.8 (0.476) | 7.2 (0.439) | 8.5 (0.519) |
| Relief pressure | KPa (kg/cm 2 , psi) | 6,767 - 7,453 (69 - 76, 981 - 1,081) | 7,350 - 8,036 (75 - 82, 1,067 - 1,165) | 8,100 - 8,800 (83 - 90, 1,175 - 1,276) |
| Hydraulic fluid control | Dropping in response to increased engine revolutions |
| Hydraulic fluid | L (US qt, Imp qt)/min | 1,000 rpm: 7 (7.4, 6.2) 3,000 rpm: 5 (5.3, 4.4) | 7.5 (7.9, 6.6) |
| Range of revolution | Rpm | 700 - 9,000 |
| Revolving direction | Clockwise |
| Working fluid (Power steering system) | Name | ATF DEXRON III |
| Capacity | L (US qt, Imp qt) | Oil tank | 0.3 (0.3, 0.3) |
| Total | 0.7 (0.7, 0.6) |
| Steering wheel | Free play | Mm (in) | 17 (0.67) |
| Turning angle | Inner wheel | WRX, OUTBACK, RS, RS sport package | 34.5°+/-1.5° |
| STi | 32.9°+/-1.5° |
| Outer wheel | WRX, OUTBACK, RS, RS sport package | 30.3°+/-1.5° |
| STi | 28.5°+/-1.5° |
| Steering shaft | Clearance between steering wheel and column cover | Mm (in) | 4.0 (0.16) |
| Steering gearbox (Power steering system) | Sliding resistance | N (kgf, lb) | 400 (41, 90) or less |
| Rack shaft play in radial direction | Right-turn steering | Mm (in) | 0.19 (0.0075) or less |
| Left-turn steering | Mm (in) | Horizontal movement 0.15 (0.0059) or less Vertical movement 0.3 (0.012) or less |
| Input shaft play | In radial direction | Mm (in) | 0.18 (0.0071) or less |
| In axial direction | Mm (in) | 0.5 (0.020) or less |
| Turning resistance | N (kgf, lb) | Maximum allowable value Less than 10.5 (1.1, 2.4) Difference between right and left sliding resistance Less than 20% |
| Oil pump (Power steering system) | Pulley shaft | Radial play | Mm (in) | 0.4 (0.016) or less |
| Axial play | Mm (in) | 0.9 (0.035) or less |
| Pulley | Ditch deflection | Mm (in) | 1.0 (0.039) or less |
| Resistance to rotation | N (kgf, lb) | 9.22 (0.94, 2.07) or less |
| Regular pressure (Unloaded) | KPa (kg/cm 2 , psi) | 981 (10, 142) or less |
| Steering wheel effort (Power steering system) | At standstill with engine idling on a concrete road | N (kgf, lb) | 31.4 (3.2, 7.1) or less |
| At standstill with engine stalled on a concrete road | N (kgf, lb) | 294.2 (30, 66.2) or less |
