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.
Hydraulic Braking System
| Number | Designation | Number | Designation |
| 1 | Primary circuit | 3 | Master cylinder |
| 2 | Secondary circuit | 4 | Brake control module (BCM) |
The hydraulic brake system is a two-circuit diagonal brake system. The hydraulic brake system is divided into a primary and secondary circuits.
The primary circuit (1) includes:
- the rear chamber for the master cylinder
- the cylinder in the front right-hand brake caliper
- the cylinder in the rear left-hand brake caliper.
The secondary circuit (2) includes:
- the front chamber for the master cylinder
- the cylinder in the front left-hand brake caliper
- the cylinder in the rear right-hand brake caliper.
Two cables run from the master cylinder (3) to the brake control module (BCM) (4), where the brake pipes then branch to the wheel brakes.
Use the Manual With the Right Hardware
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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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