
1. Reservoir cap
2. Reservoir
3. Brake booster
4. Master cylinder
5. Push rod
1.Turm ignition switch OFF and disconnect the negative (-) battery cable.
2.Remove the battery.(Refer to Engine Electrical System - "Battery")
3.Disconnect the brake fluid level sensor 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.
• Make sure no dirt or other foreign matter is allowed to contaminate the brake fluid.
5.Separate the brake tube (A) from the master cylinder after loosening the tube flare nut.
Tightening torque :18.6 - 22.6 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb-ft)

• Be careful of tap damage and nicks when removing the brake tube.
• Since oil leakage may occur during installation, assemble the flare nut accurately, paying attention to the location of the brake tube.
6.Remove the master cylinder (A) after loosening the master cylinder nuts.
Tightening torque :9.8 - 15.7 N.m (1.0 - 1.6 kgf.m, 7.2 - 11.6 lb-ft)

7.Separate the reservoir from the master cylinder after removing the screw (A).

1.Installation is the reverse of removal.
• Before installing the pin, apply the grease to the joint pin.
• Use a new snap pin whenever installing.
2.After installation, bleed the brake system.(Refer to Brake System - "Brake Bleeding Procedures")
3.Check the brake oil leakage and pedal operating condition.
Brake Booster
Brake LineHyundai Tucson (NX4) 2022-2026 Service Manual: Tire
- Tire Wear
• Using tires and wheel other than the recommended sizes could
cause unusual handling characteristics and poor vehicle control,
resulting in a serious accident.
1.Measure the tread depth of the tires.Tread depth [limit] : 1.6 mm (0.0630 in.)
2.If the rema ...
Hyundai Tucson (NX4) 2022-2026 Owner's Manual: Radial-Ply Tires
Radial-ply tires provide improved
tread life, road hazard resistance
and smoother high speed ride. The
radial-ply tires used on this vehicle
are of belted construction, and are
selected to complement the ride
and handling characteristics of
your vehicle. Radial-ply tires have
the sam ...