How to Determine When to Replace Brake Fluid in a Car?

[OHarper]

Typically, the method of measuring water content is used to determine whether the brake fluid needs to be replaced. Generally, the car manual specifies that the brake fluid should be replaced every two years. The brake fluid determines whether the car's braking system can function properly, and it must comply with the national mandatory standards. The methods to determine the water content in brake fluid are as follows: 1. Water content detection pen: Insert the water content detection pen into the brake fluid reservoir. If the water content exceeds 3%, the brake fluid needs to be replaced. 2. Operating time: According to research, for a new car, the water content in the brake fluid is about 2% after 12 months of operation; after 18 months, the water content can reach 3%; after five years or more, the water content in the brake fluid can reach 7-8%. It is recommended to replace the brake fluid if the water content exceeds 3%.