Caution: Follow the brake fluid handling instructions in Section Replacing brake fluid.
The brake system pipes connect the main brake cylinder with the four wheel cylinders. The connection between the rigid and moving parts of the brake system, for example, between the calipers, is carried out by flexible high-pressure hoses. If there is visible damage, the latter must be replaced.
Caution: Do not allow brake hoses to come into contact with oil or fuel, and do not paint or coat them with underbody protection.
Safety Note
If one of the chambers of the brake fluid reservoir is completely empty (for example, if there is a leak in the brake system or if you forgot to add fluid to the reservoir when removing air), air is sucked into the system and enters the ABS pump. In this case, air from the brake system must be removed at a service station using a special device.
(This article was previously published on the resource: AUDIMANUAL.ru)