Clean the brake lines with cold cleaner.
Caution! The brake lines are coated with a synthetic coating to protect them from corrosion. If this coating is damaged, the lines will corrode. Therefore, do not clean the lines with a wire brush, sandpaper or screwdriver.
Check the brake lines from the master cylinder to the individual brake calipers using a light. The master cylinder is located in the engine compartment under the brake fluid reservoir.
The brake lines should not be bent or crushed, and there should be no rust or abrasions on them. If they are, replace the brake line to the nearest connection.
Brake hoses connect the brake pipes to the brake calipers on the moving parts of the car. They are made of a material that is resistant to high pressure, but over time they can become porous, swell, or be cut by sharp objects. In such cases, they should be replaced immediately.
Bend the brake hoses by hand in different directions to check for damage. The hoses must not be rotated.
Turn the steering wheel left and right until it stops. The brake hoses should not rub against the car parts.
The connection elements of the brake pipes and hoses must not be wet from escaping brake fluid.
Caution! If the reservoir and seals are wet from leaking brake fluid, this is not necessarily a sign of a faulty master cylinder. Most often, brake fluid can leak through the vent in the cap or through the sealing gasket of the cap.
Lower the car to the ground.
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