Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Subaru Outback Base, Standard TransFACTORY OEM SERVICE PROCEDURE
Section 42 (Brake System): General Description: Specification
WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.
| Front disc brake | Type | Disc (Floating type, ventilated) | |
| Effective disc diameter | mm (in) | 261 (10.28) | |
| Disc thickness x Diameter | mm (in) | 30 x 316 (1.18 x 12.44) | |
| Effective cylinder diameter | 42.8 (1.685) x 2 | ||
| Pad dimensions (Length x Width x Thickness) | mm (in) | 130.0 x 53.5 x 11.0 (5.118 x 2.106 x 0.433) | |
| Clearance adjustment | Automatic adjustment | ||
| Rear disc brake | Type | Disc (Floating type, ventilated) | |
| Effective disc diameter | mm (in) | 284.5 (11.2) | |
| Disc thickness x Diameter | mm (in) | 18 x 320 (0.71 x 12.59) | |
| Effective cylinder diameter | mm (in) | 40.46 (1.592) | |
| Pad dimensions (Length x Width x Thickness) | mm (in) | 95.5 x 34.8 x 11.0 (3.759 x 1.370 x 0.433) | |
| 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) | 285 (17.39) | |
| Brake booster | Type | Vacuum suspended | |
| Effective diameter | mm (in) | 238 + 261 (9.37 + 10.28) | |
| Brake line | Dual circuit system | ||
| Brake fluid
CAUTION:
|
FMVSS No. 116, DOT3, or DOT4 | ||
NOTE:
Refer to SPECIFICATION
for parking brake specifications.
SPECIFICATION, General Description.
| Item | Standard | Limit | ||
|---|---|---|---|---|
| Front brake | Pad thickness | mm (in) | 11 (0.43) | 1.5 (0.059) |
| Disc thickness | mm (in) | 30 (1.18) | 28 (1.10) | |
| Disc runout | mm (in) | - | 0.05 (0.0020) | |
| Rear brake (disc type) | Pad thickness | mm (in) | 11.0 (0.433) | 1.5 (0.059) |
| Disc thickness | mm (in) | 18 (0.71) | 16 (0.63) | |
| Disc runout | mm (in) | - | 0.05 (0.0020) | |
| Parking brake | Inside diameter | mm (in) | 210 (8.27) | 211 (8.31) |
| Lining thickness | mm (in) | 4.0 (0.157) | 1.5 (0.059) | |
| Pedal stroke | 5 to 6 notches/300 N (30 kgf, 67.5 lb) | |||
| Brake pedal force N (kgf, lb) | Fluid pressure kPa (kgf/cm2 , psi) | ||
| Brake booster | Brake fluid pressure with engine stopped | 147 (15, 33) | 590 (6, 86) |
| 294 (30, 66) | 1654 (17, 240) | ||
| Brake fluid pressure with engine running and vacuum pressure at 66.7 kPa (500 mmHg, 19.69 inHg) | 147 (15, 33) | 8539 (87, 1238) | |
| 294 (30, 66) | 15373 (157, 2229) | ||
| Brake pedal | Free play | mm (in) | 0.5 - 2 (0.02 - 0.08) [When pulling the brake pedal upward with a force of less than 10 N (1 kgf, 2 lb)] |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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