Hyundai Tucson: Brake System / Troubleshooting
| Symptom | Expected cause | Countermeasure |
| Lower pedal or sponge pedal | Brake system (oil leakage) | Repair |
| Brake system (air inflow) | Air bleeding out procedure | |
| Piston seal (worn out or damaged) | Replace | |
| Rear brake shoe separation (faulty adjustment) | Adjust | |
| Master cylinder (malfunction) | Replace | |
| Brake drag | Brake pedal free separation (minimum) | Adjust |
| Parking brake cable length (adjustment trouble) | Adjust | |
| Parking brake cable (trapped) | Repair | |
| Rear brake shoe separation (adjustment trouble) | Adjust | |
| Pad and lining (twisted or cracked) | Replace | |
| Piston (trapped) | Replace | |
| Piston (frozen) | Replace | |
| Anker or return spring (malfunction) | Replace | |
| Booster system (Vacuum leaks) | Repair | |
| Master cylinder (malfunction) | Replace | |
| Uneven brake | Piston (trapped) | Replace |
| Pad and lining (oil stain, cracked or twisted) | Replace | |
| Heavy pedal and brake trouble | Brake system (oil leakage, air inflow) | Perform air bleeding procedure |
| Pad or lining (worned out) | Replace | |
| Pad or lining (cracked or twisted) | Replace | |
| Rear brake shoe separation (adjustment trouble) | Adjust | |
| Pad or lining (oil stain) | Replace | |
| Pad or lining (slippery) | Replace | |
| Disc (scratched) | Replace | |
| Booster system (Vacuum leaks) | Repair | |
| Noise from brake | Pad or lining (cracked or twisted) | Replace |
| Looseness of wheel bolt and caliper | Adjust | |
| Pad sliding trouble (Pad uneven worn out) | Replace | |
| Pad or lining (dirty) | Cleaning | |
| Pad or lining (slippery) | Pad replacement | |
| Anker or return spring (malfunction) | Replace | |
| Brake pad shim (damaged) | Replace | |
| Hold down spring (damaged) | Replace | |
| Foreign substance stucked between disc and pad | Cleaning | |
| Corrosion on disc | Test drive vehicle to get rid of corrosion between rotor and pads. | |
| Caved disc | Replace | |
| Poor braking performance (at highway speeds) | Pad or lining (worned out) | Replace |
| Master cylinder (malfunction) | Replace | |
| Brake vibration | Brake booster (Vacuum leaks) | Repair |
| Pedal free separation | Adjust | |
| Master cylinder (malfunction) | Replace | |
| Damaged on master cylinder cap | Replace | |
| Damaged on brake line | Replace | |
| Caliper returning trouble (while tire is turning, check the noise) | Replace | |
| Transformed disc | Replace |
Brake System
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Specifications
- Specifications
ItemSpecification
Master cylinderTypeTandem
I.D. mm (in)22.22 mm (0.87 in)
Piston stroke mm (in) 45 mm (1.77 in)
Brake boosterType11" Tie-rod
Boosting ratio10.5 : 1
Front dis ...
Other information:
Hyundai Tucson (NX4) 2022-2025 Owner's Manual: Driver Attention Warning
Operation
Basic function
The Driver Attention Warning informs
you of the "Attention Level" and when to
"Consider taking a break".
Attention level
The driver’s attention level appears on
a scale of 1 to 5. The lower the level, the
sooner you must take a break.
Driver Attention Warning operat ...
Hyundai Tucson (NX4) 2022-2025 Owner's Manual: Before Using Driver Assistance System
WARNING
Always maintain a safe distance from the
vehicles ahead and adjust your vehicle
speed to the road conditions. Driver
Assistance system may not operate in all
situations and cannot avoid all collisions.
To prevent serious injury or death:
Control your vehicle at all times. In
...
