Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2012 Ford Mustang V6 – Severe Brake Leakage Rear Passenger Side › Reply To: 2012 Ford Mustang V6 – Severe Brake Leakage Rear Passenger Side June 27, 2020 at 9:57 am #958623 Richard KirshyParticipant My thought would be, having brake fluid in the brakes and wheel, most likely you have a leaking caliper.