Checking the brake fluid level (VW Passat B3)

The brake fluid expansion tank is located in the engine compartment. The tank has 2 chambers, one for each brake circuit. The screw cap has a ventilation hole that cannot be closed.



The expansion tank is made of transparent material so that the brake fluid level can be checked from the outside at any time.

The fluid level should be between the "MAX" and "MIN" marks.

Fill only with new brake fluid that meets FMVSS 11 6 DOT 4 specification.

Cars with ABS system

The expansion tank is divided into 3 chambers: one chamber for each front wheel brake and one chamber for both rear wheel brakes.

The original article is available on the website: VWManual.ru



To check the brake fluid level, turn on the ignition and wait until the electric pump of the hydraulic system switches off by itself. This should happen within one minute. Switching off the pump indicates that the required working pressure has been created, which is necessary for the functioning of the brake system. In this state of the system, the brake fluid level should not exceed the "MAX" mark.

Attention: When the operating pressure in the system is low, the fluid level may be slightly higher than the "MAX" mark.

Due to wear of the disc brakes, the brake fluid level drops slightly - this is normal. When the brake fluid level is slightly above the "MIN" mark and at the same time the wear of the brake pads is close to the limit, there is no need to top up the fluid level.

If the level in the tank decreases in a short time, this indicates a loss of brake fluid.

In this case, it is necessary to immediately look for the leak. As a rule, the cause lies in worn cuffs of the wheel brake cylinders. For safety reasons, the brake system should be checked in a specialized workshop.