Section 16 (Brake System (WRX)): General Description: Specification
WARNING: This page is about a different car, the 2013 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
| Front disc brake |
Size |
Brembo 17-inch type |
16-inch type |
| Type |
Disc (Opposed type, ventilated) |
Disc (Floating type, ventilated) |
| Effective disc diameter |
mm (in) |
268 (10.55) |
244 (9.61) |
| Disc thickness x Diameter |
mm (in) |
30 x 326 (1.18 x 12.83) |
24 x 294 (0.94 x 11.57) |
| Effective cylinder diameter |
mm (in) |
40.0 x 2, 46.0 x 2 (1.575 x 2, 1.811 x 2) |
42.8 (1.685) x 2 |
| Pad dimensions (Length x Width x Thickness) |
mm (in) |
131.8 x 60.5 x 8.9 (5.189 x 2.382 x 0.35) |
117.8 x 50.5 x 11.0 (4.638 x 1.988 x 0.433) |
| Clearance adjustment |
Automatic adjustment |
| Rear disc brake |
Size |
Brembo 17-inch type |
15-inch type |
| Type |
Disc (Opposed type, ventilated) |
Disc (Floating type, solid) |
| Effective disc diameter |
mm (in) |
268 (10.55) |
250 (9.84) |
| Disc thickness x Diameter |
mm (in) |
20 x 316 (0.79 x 12.44) |
10 x 286 (0.39 x 11.26) |
| Effective cylinder diameter |
mm (in) |
40.0 (1.575) x 2 |
38.1 (1.500) |
| Pad dimensions (Length x Width x Thickness) |
mm (in) |
76.8 x 45.0 x 9.0 (3.024 x 1.772 x 0.354) |
92.0 x 33.0 x 9.0 (3.622 x 1.299 x 0.354) |
| Clearance adjustment |
Automatic adjustment |
| Master cylinder |
Type |
Tandem |
| Effective diameter |
mm (in) |
23.8 (15/16) |
| Reservoir type |
Sealed type |
| Brake fluid reservoir capacity |
cm3
(cu in) |
205 (12.51) |
| Brake booster |
Type |
Vacuum suspended |
| Effective diameter |
mm (in) |
208 + 229 (8.19 + 9.02) |
| Brake line |
Dual circuit system |
Brake fluid
CAUTION:
- Avoid mixing brake fluid of different brands to prevent fluid performance from degrading.
- When filling with brake fluid, be careful not to allow any dust to enter the reservoir.
- Use new SUBARU genuine brake fluid when replacing or refilling the fluid.
|
FMVSS No. 116, DOT3, or DOT4 |
NOTE:
For parking brake specifications. < Ref. to
SPECIFICATION
, General Description. >
| Item |
Standard |
Limit |
| Front brake |
Pad thickness |
mm (in) |
16-inch type |
11 (0.43) |
1.5 (0.059) |
| Brembo 17-inch type |
8.9 (0.35) |
1.2 (0.047) |
| Disc thickness |
mm (in) |
16-inch type |
24 (0.94) |
22 (0.87) |
| Brembo 17-inch type |
30 (1.18) |
28 (1.10) |
| Disc runout |
mm (in) |
16-inch type |
- |
0.050 (0.0020) |
| Brembo 17-inch type |
- |
0.075 (0.0030) |
| Rear brake |
Pad thickness |
mm (in) |
15-inch type |
9.0 (0.354) |
1.5 (0.059) |
| Brembo 17-inch type |
9.0 (0.354) |
1.2 (0.047) |
| Disc thickness |
mm (in) |
15-inch type |
10 (0.39) |
8.5 (0.335) |
| Brembo 17-inch type |
20 (0.79) |
18 (0.71) |
| Disc runout |
mm (in) |
15-inch type |
- |
0.050 (0.0020) |
| Brembo 17-inch type |
- |
0.070 (0.0028) |
| Parking brake |
Inside diameter |
mm (in) |
190 (7.48) |
191 (7.52) |
| Lining thickness |
mm (in) |
2.8 (0.11) |
1.5 (0.059) |
| Lever stroke |
7 - 8 notches/200 N (20 kgf, 45 lbf) |
| Brake pedal force N (kgf, lbf) |
Fluid pressure kPa (kgf/cm2
, psi) |
| Brembo 17-inch type |
16-inch type |
| Brake booster |
Brake fluid pressure with engine stopped |
147 (15, 33) |
545 (6, 79) |
| 294 (30, 66) |
1564 (16, 227) |
| Brake fluid pressure with engine running and vacuum pressure at 66.7 kPa (500 mmHg, 19.69 inHg) |
147 (15, 33) |
4984 (51, 723) |
6003 (61, 871) |
| 294 (30, 66) |
10249 (105, 1486) |
11273 (115, 1635) |
| Brake pedal |
Free play |
mm (in) |
0.5 - 2 (0.020 - 0.079) [When pulling the brake pedal upward with a force of less than 10 N (1 kgf, 2 lbf)] |