Hyundai Sonata LF Quiz
Brake System

Specifications

In this manual: Brake System
General Information — 9Engine Mechanical System — 90Engine Electrical System — 58Emission Control System — 24Engine Control System/Fuel System — 114Drive Shaft and Axle — 15Suspension System — 35Steering — 19Restraints — 50Brake System — 54Body (Interior and Exterior) — 213Body Electrical System — 241Heating, Ventilation, and Air Conditioning — 56DCT (Dual Clutch Transmission) System — 52
~4min read

Specifications

Item Specification
Master Cylinder
Type Single
ITEM mm (in) NOT EPB 22.22 mm
EPB 23.81 mm
Piston Stroke, mm (in) 45 ± 1 mm (1.77 ± 0.039 in.)
Fluid Level Sensor Provided
Brake booster ?
Type 11-inch single
Booster Ratio 9:01
Front Disc Brake
Type Ventilated Disc
Disc O.D. GAMMA 1.6 T-GDI 305 mm (12.0078 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI 320 mm (15.5984 in.)
EPB
Disc
Thickness		 GAMMA 1.6 T-GDI 25 mm (0.9842 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI 28 mm (1.1023 in.)
EPB
Disc
Service Limit		 GAMMA 1.6 T-GDI 23.4 mm (0.9212 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI 26.4 mm (1.0393 in.)
EPB
Pad
Thickness		 GAMMA 1.6 T-GDI 11.5 mm (0.4527 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI 10.5 mm (0.4133 in.)
EPB
Pad
Service Limit		 GAMMA 1.6 T-GDI 2.0 mm (0.0787 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI
EPB
Cylinder Type Single piston
Rear Disc Brake
Type Solid Disc
Disc O.D. GAMMA 1.6 T-GDI 284 mm (11.1811 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI
EPB
Disc Thickness GAMMA 1.6 T-GDI 10 mm (0.3937 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI
EPB
Disc Service Limit GAMMA 1.6 T-GDI 8.4 mm (0.3307 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI
EPB
Pad
Thickness		 GAMMA 1.6 T-GDI 10 mm (0.3937 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI
EPB
Pad
Service Limit		 GAMMA 1.6 T-GDI 2.0 mm (0.0787 in.)
THETA 2.4 GDI
THETA 2.0 T-GDI
EPB
Cylinder Type Single piston
Parking Brake
Type DIH (Drum-in-Hat)
Drum (Disc) ID O 168 mm (6.61 in)

Specifications (ESP)
Part Item Standard Value NOTE
HECU System 4-Channel 4-Sensor (Solenoid) Full Control
Type Motor, Integrated Valve Relay Type (ABS, EBD, TCS, ESP)
Operating Voltage 10 ~ 16 V ?
Operating Temperature -40 ~ 120 °C ?
Engine Power 290 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 47 teeth ?
Air gap Front 0.4 - 1.2 mm ?
Rear 0.4 ~ 1.0 mm
Steering Wheel Angle Sensor Operating Voltage 8 ~ 16 V ?
Current Consumption Max. 150 mA ?
Output Measurement Range -780 ~ +779,9° ?
Operating Angular Rate 0 ~ 1016 °/sec ?

Service Standards
Items Standard Value
Brake pedal full travel 135 mm (5.31 in.)
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)

Tightening Torques
Items N·m kgf·m lb-ft
Master cylinder to brake booster 9,8 ~ 15,6 1,0 ~ 1,6 7,2 ~ 11,6
Brake Tube Flare Nuts at Master Cylinder 18,6 ~ 22,6 1,9 ~ 2,3 13,7~16,6
Brake booster mounting nuts 9,8 ~ 14,7 1,0 ~ 1,5 7,2 ~ 10,8
Bleeder 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 steering knuckle 78,5 ~ 98,1 8,0 ~ 10,0 57,9 ~ 72,3
Rear caliper assembly to steering knuckle 78,5 ~ 98,1 8,0 ~ 10,0 57,9 ~ 72,3
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
Front Wheel Speed Sensor Mounting Bolt 7,8 ~ 9,8 0,8 ~ 1,0 5,8 ~ 7,2
HECU Bracket Mounting Bolt and Nut 19,6 ~ 29,4 2,0 ~ 3,0 14,5 ~ 21,7
HECU Brake Tube Flare Nuts 18,6 ~ 22,6 1,9 ~ 2,3 13,7~16,6

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

Test yourself

A quick Hyundai Sonata LF quiz: every answer comes with an explanation and a link to the manual page.