Changing brake fluid can be a slippery subject. Mercedes-Benz, for example, says brake fluid should be replaced every two years or 20,000 miles, and Volkswagen says that should be done on most of its models every two years regardless of mileage. Subaru recommends fresh brake fluid every 30,000 miles. 
On the other hand, most Chevrolets can go 150,000 miles or 10 years, and many Ford, Chrysler and Toyota vehicles don't list brake fluid as a regular maintenance item.
Check your car's owner's manu...

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