Brake System
Master Cylinder Repair Procedures
In this manual: Brake System
11steps
~66min
3/5difficulty
Done 0 of 11
Removal
- Turn the ignition switch OFF and disconnect the negative (-) battery cable.
- Disconnect the ECM connector (A) and the TCM connector (B), IDB (C), then remove the noise insulator (D).

- Remove the upper cover of the cover. (Refer to Cover - Upper Cover)
- Remove the ECM, TCM and IDB.
- Remove the clamp (A) and the vacuum brake hose (B).

- Remove the clip (A), then disconnect the brake fluid level sensor connector (B).

- Remove the brake fluid from the master cylinder reservoir using a syringe.
Do not spill brake fluid on the vehicle, as it may damage the paint. If brake fluid gets on the paint, wash it off immediately with water.
- Loosen the hose connecting bolt (A) and disconnect the brake tube.
Tightening torque: 29.4 ~ 34 N·m

Do NOT reuse the washers. Be sure to install new ones. Reusing a washer may cause brake system failure or accidents due to oil leakage. Tighten to the specified torque using a torque wrench. Do not use an air ratchet or power tools.
- Remove the master cylinder (B) from the brake booster after first loosening the mounting nuts (A).
Tightening Torque: 12.8 ~ 16.7 N·m

Installation
- To install, reverse the removal procedure.
- After installation, bleed the brake system. (Refer to Brake System - Brake System Bleeding)
Test yourself
A quick Hyundai Genesis DH quiz: every answer comes with an explanation and a link to the manual page.
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