Master Cylinder (Brand New): amzn.to/2Cshk9y
In this video we replace a master cylinder that has failed internally and is allowing some of the fluid to bypass which causes the pedal to sink. The fluid also almost leaked into the brake vacuum booster which would have also required replacement however this was caught just in time. If brake fluid leaks down into the brake booster, it will eventually eat away and the rubber diaphragm and cause loss of power brakes.