Kia Optima Hybrid Owner's Manual Quiz
Brake System

Specifications

In this manual: Brake System
General Information — 4Engine Mechanical System — 50Engine Electrical System — 20Emission Control System — 30Engine Control System/Fuel System — 84Automatic Transmission — 98Drive Shaft and Axle — 15Suspension System — 36Steering — 12Restraints — 50Brake System — 38Body (Interior and Exterior) — 54Body Electrical System — 233Heating, Ventilation, and Air Conditioning — 57
~3min read

Specifications

Item Specification
Front Disc Brake Type Ventilated Disc
Rear Disc Ø 300 mm (11.81 in.)
Disc Thickness 28 mm (1.10 in.)
Caliper Piston Single
Cylinder Inner Diameter Ø 60 mm (2.36 in.)
Rear Disc Brake Type Solid Disc
Rear Disc Ø 284 mm (11.18 in.)
Disc Thickness 10 mm (0.39 in.)
Caliper Piston Single
Cylinder Inner Diameter O 34 mm (1.34 in)
Parking Brake Type DIH (Drum-in-Hat)
Drum I.D. O 168 mm (6.61 in)

O.D.: Outer Diameter, I.D.: Inner Diameter
Specifications (ESC)
Part Item Standard Value NOTE
Integrated
Brake
Actuation
Unit (IBAU)		 System 4-Channel 4-Sensor (Solenoid) Full Control
(ABS, EBD, TCS, ESC)
Type Motor, Integrated Valve Relay Type
Operating Voltage 10 ~ 16 V
Operating Temperature -40 ~ 120 °C
Engine Power 270 W
Active wheel speed sensor Supply Voltage 4.5 ~ 20 V DC ?
Low Output Current 5.9 ~ 8.4 mA ?
High Output Current 11.8 ~ 16.8 mA ?
Output range 1 ~ 2500 Hz ?
Tone wheel Front: 48 teeth, Rear: 47 teeth ?
Air Gap
?		 Front 0.4 ~ 1.5 mm ?
Rear 0.4 ~ 1.0 mm
Yaw Rate and Lateral Acceleration Sensor
(Type May Vary)		 Operating Voltage 10 ~ 16 V ?
Current Consumption Max. 140 mA ?
Yaw Rate Sensor Measuring Range -75 ~ +75 °/sec ?
Lateral G Sensor Measuring Range -14.715 ~ 14.715 m/s² ?
Pressure
Source
Unit
(PSB)		 System 4-Channel 4-Sensor (Solenoid)
Operating Voltage 10 ~ 16 V
Operating Temperature -40 ~ 125 °C
Engine Power 170 W

Service Standard
Items Standard Value
Brake pedal full travel 130 mm
Stop light 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 28 mm (1.10 in.)
Front brake pad thickness 11 mm (0.43 in.)
Rear brake disc thickness 10 mm (0.39 in.)
Rear brake pad thickness 10 mm (0.39 in.)

Tightening Torque
Items N·m kgf·m lb-ft
Hub Nut 88,3 ~ 107,9 9,0 ~ 11,0 65,1 ~ 79,6
Bleeder screw 6,9 ~ 12,7 0,7 ~ 1,3 5,1 ~ 9,4
Brake tube flare nuts 12,7 ~ 16,7 1,3 ~ 1,7 9,4 ~ 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 steering knuckle 78,5 ~ 98,1 8,0 ~ 10,0 57,9 ~ 72,3
Rear caliper assembly to steering 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 bracket bolts 9,8 ~ 14,7 1,0 ~ 1,5 7,2 ~ 10,8
Brake Pedal Shaft Nut 29,4 ~ 34,3 3,0 ~ 3,5 21,7 ~ 25,3
Wheel speed sensor mounting bolt 6,9 ~ 10,8 0,7 ~ 1,1 5,1 ~ 8,0
IBAU Bracket Mounting Bolts 10,8 ~ 12,7 1,1 ~ 1,3 8,0 ~ 9,4
Yaw Rate and Acceleration Sensor Mounting Nuts 6,9 ~ 10,8 0,7 ~ 1,1 5,1 ~ 8,0
IBAU Brake Tube Flare Nuts 13,7 ~ 16,7 1,4 ~ 1,7 10,1 ~ 12,3
PSB 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 contact surface Heat-resistant grease As required
Front Caliper Guide Rod and Boot AI-11P 1.2 g ~ 1.7 g (Trailing)
1.0 g ~ 1.5 g (Leading)
Rear Caliper Guide Rod and Boot AI-11P 0.8 g ~ 1.3 g

Test yourself

A quick Kia Optima Hybrid Owner's Manual quiz: every answer comes with an explanation and a link to the manual page.