Sir, / Ma'am,
Thank You for your inquiry, the symptom you describe MAY be a faulty Brake Master Cylinder, or a fault in the vehicle's ABS System, We recommend that you consult a professional.
RepairPal Certified shops can diagnose and repair your 2005 Hyundai Santa Fe. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.