Brake system malfunctions (Opel Vectra C)

Note: Before making a final determination that there is a problem with the brake system, make sure that the tires are in good condition and inflated to the required pressure, that the front wheel alignment is correct, and that the vehicle is not unevenly loaded.

Increased brake pedal travel

1. The working circuit of the brake tract is damaged - check the system for leaks.

The brake pedal springs and sinks

1. Air has entered the brake system, bleed the system.

2. The fluid level in the master cylinder reservoir has dropped - make the appropriate adjustments, bleed the system.

3. Formation of steam bubbles. Occurs mainly under heavy load on the brakes. Replace the brake fluid, remove air from the system.

Reduced braking effect, pedal falls through

1. The hydraulic circuit is not sealed.

2. The seals in the main or working brake cylinders are damaged.

3. The rubber gasket is damaged. Repair the caliper.

Poor braking despite high pedal force

1. Brake linings are oily.

2. Incorrect or hardened pads are installed.



3. The brake booster is faulty.

4. The brake pads are worn out.

When braking, the car pulls to the side

1. The tire inflation pressure is not correct.

2. The treads are worn unevenly.

3. Brake linings are oily.

4. Different brake pads are installed on the same axle.

5. Brake pads are excessively worn.

6. The caliper shafts are dirty.

7. The calipers are damaged by corrosion, replace them. 8. The pads are unevenly worn.

Spontaneous braking, heating of brake pads while driving

1. The compensation hole in the master brake cylinder (MBC) is clogged.

2. The clearance between the drive rod and the master cylinder piston is insufficient.

The brakes are shaking

1. The wrong type of brake pads are installed.

2. The brake disc is corroded in places.

3. The brake disc runout is excessive.

The brake pads do not move away from the brake disc, the wheel is difficult to turn manually

1. Corrosion in brake caliper cylinders. Repair or replace the caliper.

2. For the rear wheels - the parking brake drive may be incorrectly adjusted.

Uneven wear of brake pads

1. The wrong type of brake pads are installed. Replace the pads.

[Original source is on the website OPELBOOK.ru]

2. The calipers are damaged by corrosion, replace them.

3. The piston stroke is difficult.

4. The tightness of the brake system tract is broken.

Wedge-shaped wear of brake pads

1. The brake disc does not rotate parallel to the caliper.

2. The calipers are damaged by corrosion, replace them.

3. The piston is not functioning properly.

Squeaking brakes

1. Often the reason is atmospheric influence (air humidity). If the creaking appears after a long period of standing in high humidity and then disappears, there is no need to do anything.



2. The wrong type of brake pads are installed.

3. The brake disc does not rotate parallel to the caliper.

4. The caliper shaft is dirty.

5. The brake shoe mounting springs are bent.

6. The pressure springs are stretched.

Brake pedal pulsation

1. Sign of normal ABS operation.

2. The brake disc runout is excessive.

3. The brake disc does not rotate parallel to the caliper.

ABS warning light comes on while driving

1. The supply voltage is insufficient (below 10 V). Check the voltage. Check whether the generator indicator lamp goes out after the engine starts.

2. There is a fault with the ABS, check the condition and reliability of the clamp connection of the ground of the return pump (in the hydromodulator).