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.
2021 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Parking Brake System: General Description: Specification
- Drum in disc type model
| Item | Specification | |
|---|---|---|
| Type | Drum in disc duo servo type | |
| Effective drum diameter mm (in) | 190 (7.48) | |
| Lining dimensions (Length x Width x Thickness) mm (in) | 165 x 30 x 3.5 (6.51 x 1.181 x 0.14) | |
| Inside diameter mm (in) | Standard | 190 (7.48) |
| Limit | 191 (7.52) | |
| Lining thickness mm (in) | Standard | 3.5 (0.14) |
| Limit | 1.5 (0.059) | |
| Clearance adjustment | Manual adjustment | |
| Free play adjusting method | Auto adjuster | |
| Operation method | Manual lever type | |
| Lever stroke Notches/N (kgf, lbf) | 7 - 8/200 (20.4, 45) | |
- Electronic parking brake model
| Item | Specification |
|---|---|
| Type | Electric type |
| Clearance adjustment | Automatic adjusting |
| Operation method | Switch type |
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.