The electrical plug for the fluid level sensor is reconnected. Then the new master cylinder is bolted to the brake booster and the brake lines are reattached. The new master cylinder must be bench-bled to expel air from internal passages that contain the piston.
![2006 honda s2000 clutch master cylinder 2006 honda s2000 clutch master cylinder](https://moneypit-garage.com/assets/images/s2000-build-1.jpg)
Once all steel brake lines are disconnected from the master cylinder, the master cylinder is unbolted from the brake booster and removed from the vehicle.There is usually an electrical plug connecting to a brake fluid level sensor on the master cylinder reservoir and that plug must be disconnected. On vehicles with power brakes, the master cylinder is bolted to the metal housing of the power brake booster.How do mechanics replace the brake master cylinder? If the brake system warning light illuminates, there are several potential causes but failure of the master cylinder is in the list of causes that would have to be investigated. Discoloration of brake fluid can also occur due to moisture and particulate contaminants in the fluid. No brake fluids, other than those specified for the year, make, and model, are fully compatible with a car’s internal rubber seals in the master cylinder. In all cases, you will experience reduced braking abilities.
![2006 honda s2000 clutch master cylinder 2006 honda s2000 clutch master cylinder](https://www.picclickimg.com/d/l400/pict/202667548824_/S2000-CMC-CLUTCH-MASTER-CYLINDER-KIT-BLACK-LINE.jpg)
Internal leaks will typically be accompanied by a low pedal, a spongy brake pedal, or a pedal that slowly sinks as you maintain pressure. Faulty internal seals on the piston can cause internal leaks and also seepage of brake fluid into the power assist brake booster.