To replace Brake Fluid Level Indicator Switch, first remove the Electrical Connector from the brake fluid level sensor. Look for the retaining tabs at the end of the brake fluid level sensor and depress it with the help of needle nose pliers, and then press the sensor through the reservoir to remove it. In regards to installation, line up the brake fluid level sensor to the master cylinder reservoir and snap it in. Finally, hook up the electrical connector to brake fluid level sensor.