A-1 CARDONE 13-2849 New Select Master Cylinder A1 CARDONE 13-2849 MASTER CYLINDER Brand New in the Box Installation Instructions Included Check booster for a defective push rod seal. If this seal is bad, it could drain the brake fluid out of the master cylinder. The master cylinder is working correctly. Check for a faulty brake booster or frozen wheel cylinder/caliper. Check booster for a defective push rod seal. If this seal is bad, it could drain the brake fluid out of the master cylinder.