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Home >> Hyundai >> 2020 >> Sonata SEL >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Except HEV) >> Brake Oil >> Repair Procedures >> Replacement

Repair Procedures: Replacement

CAUTION:
  • Be careful not to damage the parts located under the vehicle (floor under cover, fuel filter, fuel tank and canister) when raising the vehicle using the lift.

    (Refer to General Information - "LIFT AND SUPPORT POINTS ")

  1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
  2. Disconnect the brake fluid level sensor connector (A).
    G14526025Courtesy of HYUNDAI MOTOR AMERICA
  3. Remove the brake fluid from the master cylinder reservoir with a syringe.
    NOTE:
    • 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.
    • Make sure no dirt or other foreign matter is allowed to contaminate the brake fluid.
  4. Loosen the bleed screw (A) and depress the brake pedal repeatedly several times until the brake fluid reaches the caliper cylinder.

    [Front] 

    G14526026Courtesy of HYUNDAI MOTOR AMERICA

    [Rear] 

    G14526027Courtesy of HYUNDAI MOTOR AMERICA
    NOTE:
    • Work from rear right, front left, rear left to front right.
    • 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. Retighten the bleed screw and then make sure the brake fluid in the reservoir is at the MAX (upper) level line.
  6. Loosen the right-rear brake bleed screw (A) to allow air to escape from the system. Then tighten the bleed screw securely.

    [Front] 

    G14526028Courtesy of HYUNDAI MOTOR AMERICA

    [Rear] 

    G14526029Courtesy of HYUNDAI MOTOR AMERICA
    NOTE:
    • Work from rear right, front left, rear left to front right.
    • 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.
    • Make sure the brake fluid in the reservoir is at the MAX (upper) level line.
  7. Re-tighten the bleed screw.
  8. Have an assistant press the brake pedal several times to pressurize it and keep it pressed.
  9. Pump the brake pedal several times, and then loosen the bleeder screw until fluid starts to run out without bubbles. Then close the bleeder screw.

    [Front] 

    G14526030Courtesy of HYUNDAI MOTOR AMERICA

    [Rear] 

    G14526031Courtesy of HYUNDAI MOTOR AMERICA
    NOTE:
    • Work from rear right, front left, rear left to front right.
    • 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.
    • Make sure the brake fluid in the reservoir is at the MAX (upper) level line.
  10. Repeat the procedure for wheel in the sequence until air bubbles no longer appear in the fluid.
  11. Connect the negative (-) cable.
  12. Connect the brake fluid level sensor.
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