Forum Discussion
road-runner
Jul 01, 2015Explorer III
The top two possibilities IMO are air in the brake system or a failing master cylinder. If you haven't had the brake fluid replaced in the past few years, this should be done and will at the same time clear any air from the system. If the master cylinder is failing it will need to be replaced or rebuilt. If the brake fluid has never been replaced that will have accelerated deterioration of seals in the master cylinder and at the wheels.
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