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Home >> Subaru >> 2022 >> WRX Premium, Standard Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Brake System >> General Description >> Specification >> Brake Booster >> Except For Electric Brake Booster Model

Except For Electric Brake Booster Model

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) 380 (3.8, 55)
294 (30, 66) 1465 (14.9, 212)
When engine is running and vacuum pressure is at 93 kPa (697 mmHg, 27.47 inHg) 147 (15, 33) 9218 (93.9, 1336)
294 (30, 66) 16120 (164, 2338)