Hyundai Ioniq: Brake System / Specifications

Hyundai Ioniq (AE) 2017-2024 Service Manual / Brake System / Specifications

Specifications
Item
Specification
Front disc brake
Type
Ventilated disc
Disc O.D.
Ø 280 mm (11.02 in)
Disc thickness
22 mm (0.87 in)
Caliper piston
Single
Cylinder I.D.
Ø 57.2 mm (2.25 in)
Rear disc brake
Type
Solid disc
Disc O.D.
Ø  262 mm (10.31 in)
Disc thickness
10 mm (0.39 in)
Caliper piston
Single
Cylinder I.D.
Ø 33.18 mm (1.31 in)
Parking brake
Type
BIR (Ball-in-Ramp)
Actuation
Lever

Specification (ESP)
Part
Item
Standard value
Remark
Integrated Brake Actuation Unit (IBAU)
System
4 Channel 4 Sensor (Solenoid)
Total control
(ABS, EBD, TCS, ESC)
Type
Valve relay integrated type
Operating Voltage
10 - 15V
Operating Temperature
-40 - 120 °C (-40 - 248°F)
Active Wheel speed sensor
Supply voltage
DC 4.5 - 20V
 
Output current low
5.9 - 8.4 mA
 
Output current high
11.8- 16.8 mA
 
Output range
1 - 2500 Hz
 
Tone wheel
Front: 46 teeth, Rear: 46 teeth
 
Air gap
0.4 - 1.5 mm
 
Pressure Source Unit
(PSU)
System
3 piston pump/ high pressure accumulator system
 
Operating Voltage
10 - 15V
 
Operating Temperature
-40 - 120°C (-40 - 248°F)
 

Service Standard
Items
Standard value
Brake pedal Full stroke
137.0 mm ( 5.39 in)
Stop lamp switch clearance
1.0 - 2.0 mm (0.04 - 0.08 in)
Brake pedal free play
3 - 8 mm (0.12 - 0.31 in)
Front brake disc thickness
22.0 mm (0.87 in)
Front brake disc service limit
20.0 mm (0.79 in)
Front brake disc pad thickness
17.0 mm (0.67 in)
Front brake disc service limit
8.0 mm (0.31in)
Rear brake disc thickness
10.0 mm (0.39 in)
Rear brake disc service limit
8.4 mm (0.33 in)
Rear brake disc pad thickness
15.0 mm (0.60 in)
Rear brake disc service limit
7.0 mm (0.28 in)

Tightening Torques
Items
N.m
kgf.m
lb-ft
Tire wheel hub nut
107.9 - 127.5
11.0 - 13.0
79.6 - 94.0
Air bleeding screw
6.9 - 12.7
0.7 - 1.3
5.1 - 9.4
Brake tube flare nuts
13.7 - 16.7
1.4 - 1.7
10.1 - 12.3
Front caliper guide rod bolts
21.6 - 31.4
2.2 - 3.2
15.9 - 23.1
Rear caliper guide rod bolts
21.6 - 31.4
2.2 - 3.2
15.9 - 23.1
Front caliper assembly to knuckle
98.1 - 117.7
10.0 - 12.0
72.3 - 86.8
Rear caliper assembly to knuckle
63.7 - 73.5
6.5 - 7.5
47.0 - 54.2
Brake hose to caliper
24.5 - 29.4
2.5 - 3.0
18.1 - 21.7
Brake pedal member bracket bolts
16.7 - 25.5
1.7 - 2.6
12.3 - 18.8
Brake pedal mounting nut
12.7 - 19.6
1.3 - 2.0
9.4 - 14.5
Wheel speed sensor mounting bolt
7.8 - 11.8
0.8 - 1.2
5.8 - 8.7
IBAU bracket mounting bolts
10.8 - 12.7
1.1 - 1.3
8.0 - 9.4
IBAU Brake Tube Flare nuts
13.7 - 16.7
1.4 - 1.7
10.1 - 12.3
PSU Bracket mounting bolts
19.6 - 29.4
2.0 - 3.0
14.5 - 21.7

Lubricants
Items
Recommended
Quantity
Brake fluid
DOT 3 or DOT 4
As required
Brake pedal bushing and bolt
Chassis grease
As required
Parking brake shoe and backing plate contacting surface
Heat resistance grease
As required

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