Brake system specifications (Opel Astra G)

System type

Front disc brakes, rear disc brakes or drum, depending on the model.
Double hydraulic circuit with diagonal division.
Vacuum brake booster is standard equipment.
ABS is an optional extra. Rear parking brake drive wheels cable with manual control.

Type of disks

Ventilated

Disc diameter, mm

Petrol models

• Models 1.4, 1.6 and 1.8 l without ABS

256

• Models 1.8L with ABS and 2.0L

280

Diesel models

• Models 1.7 l

256

• 2.0L models

280

Maximum permissible value of disk runout, mm

• All models

0.11

Maximum permissible thickness of the disc after turning *

All models

• The anchor bracket is built into the hub carriage

21

• Separately installed anchor bracket

22

Minimum permissible thickness of brake friction linings pads, mm

• All models

2.0

Type of disks

Solid

Disc diameter, mm

Petrol models

• Models 1.4, 1.6 and 1.8 l without ABS

240

• Models 1.8L with ABS and 2.0L

264

Diesel models

• Models without ABS

240

• Models with ABS

264

Maximum permissible value of disk runout, mm

• All models

0.13

Maximum permissible thickness of the disc after turning *

• All models

8.0

Minimum permissible thickness of brake friction linings pads, mm

• All models

2.0

Inner diameter of drum, mm

Nominal value

• All models

230

Maximum permissible value

• All models

231

Minimum permissible thickness of brake friction linings shoes, mm

• All models

1.0

All models except petrol 1.8 and 2.0 l

ABS 5.3

Petrol models 1.8 l and 2.0 l

ABS 5.3/TC (combined with anti-skid system)

0035

Left Front Wheel Sensor

0040

Right Front Wheel Sensor

0045

Left rear wheel sensor

0050

Right rear wheel sensor

0060

Left Front Wheel Sensor Output Solenoid Valve

0065

Left Front Wheel Sensor Inlet Solenoid Valve

0070

Right Front Wheel Sensor Output Solenoid Valve

0075

Right Front Wheel Sensor Inlet Solenoid Valve

0080

Left rear wheel sensor output solenoid valve

0085

Left rear wheel sensor inlet solenoid valve

0090

Right rear wheel sensor output solenoid valve

0095

Right rear wheel sensor inlet solenoid valve

0110

Pump motor - supply voltage level is too low

0121

System relay circuit

0141

Traction Control System (TCS) Primary Solenoid Valve Right Front wheels

0146

Right Front Wheel TCS Solenoid Valve

0151

Primary solenoid valve TCS left front wheel

0156

Left Front Wheel TCS Solenoid Valve

0161

Brake Pedal Position (BPP) Sensor - Open Circuit

0236

Engine speed sensor - no signal

0241

Subsystem for reducing the torque developed by the engine - no signal

0244

No engine torque input signal

0245

Inadequacy of signals generated by wheel sensors

0550

Electronic Control Unit (ECU) failure

0551

ECU program failure

0800

Supply voltage

Fastening the ABS control unit to the hydraulic housing modulator

• Stage 1

6

• Stage 2

7

Brake disc retaining screw

4

Brake pipe nipple connectors

16

Brake pedal mounting nuts on the bracket side

20

Fastening the pedal support bracket to the vacuum booster

20

Bleed valve

• Front

9

• Rear (M8)

7

• Rear (M10)

10

Flexible brake hose connection nipple to caliper

40

Front Caliper Guide Bushing Bolts

28

Fastening the caliper support bracket to the rack

95

Fastening the parking brake support

10

ABS hydraulic modulator mount

8

Mounting the master brake cylinder (MBC)

25

Rear Brake Drum Mount

4

Mounting the pressure regulator supplied to the rear brake mechanisms

20

Mounting the damping weight on the rear brake caliper (if provided)

11

Fastening the rear caliper support bracket to the rear lower arm pendants

100

Fastening of wheel cylinders of rear brake mechanisms

9

Rear wheel cylinder bleeder valve

6

Wheel sensors

8

Fastening the vacuum pump to the cylinder head (diesel models)

• Engines 1.7 l

28

• 2.0L Engines

8

Wheel mounting bolts

110