Hyundai Sonata: Brake System / Master Cylinder Repair procedures

Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the air cleaner assembly (A).

3.
Disconnect the brake fluid level switch connector (A).

4.
Remove the brake fluid from the master cylinder reservoir with a syringe.
   
Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
5.
Disconnect the brake tube (A) from the master cylinder by loosening the tube flare nut.

Tightening torque:
18.6 ~ 22.6N.m (1.9 ~ 2.3kgf.m, 13.7 ~ 16.6lb-ft)

6.
Remove the master cylinder (B) from the brake booster after loosening the mounting nuts (A).

Tightening torque:
9.8 ~ 15.6N.m (1.0 ~ 1.6kgf.m, 7.2 ~ 11.6lb-ft)

7.
Loosen the screw and then remove the reservior.
Installation
1.
Installation is the reverse of removal.
2.
After installation, bleed the brake system.
(Refer to Brake System Bleeding - "Brake Sysem Bleeding")
(Refer to ESP (Electronic Stability Program System) - "ESP System Bleeding")
Master Cylinder Components and Components Location
Components 1. Reservoir cap2. Reservoir3. Pin4. Master cylinder ...

Brake Line Components and Components Location
Components ...

Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: Power Brakes
Your vehicle has power-assisted brakes that adjust automatically through normal usage. If the engine is not running or is turned off while driving, the power assist for the brakes will not work. You can still stop your vehicle by applying greater force to the brake pedal than typical. The stoppin ...

Hyundai Sonata LF 2014-2019 Owners Manual: Scheduled Maintenance Services
Follow Normal Maintenance Schedule if the vehicle is usually operated where none of the following conditions apply. If any of the following conditions apply, you must follow the Maintenance Under Severe Usage Conditions. Repeated short distance driving. Driving in dusty conditions or sandy area ...

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