Brake Booster
- Impreza model
| Item | Specification | ||
|---|---|---|---|
| Type | Vacuum suspended | ||
| Effective diameter | mm (in) | 215 + 227 (8.46 + 8.93) | |
| Brake fluid pressure | Brake pedal force N (kgf, lbf) | Fluid pressure kPa (kgf/cm2 , psi) | |
| When engine is stopped | 147 (15, 33) | 512 (5.2, 74) | |
| 294 (30, 66) | 1530 (15.6, 222) | ||
| When engine is running and vacuum pressure is at 93 kPa (697 mmHg, 27.47 inHg) | 147 (15, 33) | 7468 (76.1, 1083) | |
| 294 (30, 66) | 14808 (151, 2148) | ||
- Crosstrek model (except for hybrid)
| Item | Specification | ||
|---|---|---|---|
| Type | Vacuum suspended | ||
| Effective diameter | mm (in) | 208 + 229 (8.19 + 9.02) | |
| Brake fluid pressure | Brake pedal force N (kgf, lbf) | Fluid pressure kPa (kgf/cm2 , psi) | |
| When engine is stopped | 147 (15, 33) | 512 (5.2, 74) | |
| 294 (30, 66) | 1530 (15.6, 222) | ||
| When engine is running and vacuum pressure is at 93 kPa (697 mmHg, 27.47 inHg) | 147 (15, 33) | 7468 (76.1, 1083) | |
| 294 (30, 66) | 14808 (151, 2148) | ||
- Crosstrek hybrid model
| Item | Specification | |
|---|---|---|
| Type | Electric booster pressure type | |
| Brake fluid pressure | Brake pedal force N (kgf, lbf) | Fluid pressure kPa (kgf/cm2 , psi) |
| When the electric brake booster is operated | 200 (20.4, 45) | 210 - 2210 (2.1 - 22.5, 30.4 - 320.4) |
| 500 (51, 112.4) | 2460 - 4460 (25.1 - 45.5, 356.7 - 646.7) | |