What causes ABS to fail when braking on rainy days?

1 Answers
SanJune
07/30/25 6:02am
ABS failing when braking on rainy days can be attributed to the following reasons: 1. Air in the brake lines: Brake fluid is the medium for transmitting force in the braking system. If air enters the brake lines, the brake fluid under high pressure will appear insufficient in force, and although there is still braking force, the maximum braking force is significantly weakened. In this case, the braking system should be promptly bled at a repair shop. 2. Brake fluid not replaced for a long time: If brake fluid is not replaced in time, it will contain excessive impurities and moisture, which will affect the transmission of braking force. Therefore, brake fluid must be replaced regularly, and if possible, a moisture content test should be conducted at a repair shop. 3. Oil leakage or overly soft brake material: Generally, oil leakage from the brake master cylinder or brake lines will cause the vehicle's brakes to feel soft. If the brake material is too soft, its high-temperature stability will be poor, which can also result in soft brakes.
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