How often should the brake fluid in a Passat be changed?

1 Answers
McClara
07/29/25 7:20pm
Brake fluid is generally changed every 2 years or approximately 40,000 kilometers. Specific conditions: The replacement interval depends on the vehicle's usage. Brake fluid has certain corrosive properties and strong water absorption, so it is recommended to use a dedicated brake fluid tester to check the moisture content in the brake fluid. This helps determine whether a change is needed. Additionally, you can observe the color of the brake fluid—if it appears black, it is likely time for a replacement. Brake system: When the heat generated by the friction between the brake pads and brake discs raises the temperature to the boiling point, the moisture in the brake fluid will boil and produce bubbles. Since gas is compressible, the presence of a certain amount of bubbles in the brake lines can cause the brake pedal to feel soft when pressed, resulting in noticeably insufficient braking force. In severe cases, it may even lead to a complete loss of braking power.
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