A gurgling groaning noise from the front left hand side during the final few yards pulling up to a red light. This only happens when the brakes are hot for example after driving down a hill. The car is healthy and had no probs prior to replacing front pads and rotors, bleeding in new fluid & bedding the pads. To see if the rotors were the issue I switched pads & rotors together between front right & left, bled again but the noise still happens and is definitely from the front left.
After research thought this question was the answer which was caused by the rotors & pads although with my car the issue is just one side and didn't follow with the pads & rotors as they were switched left and right. There are no fluid leaks or issues braking aside the very disconcerting noise so I'm wondering if the front left brake hose could be contributing - or some other issue on this 2008 Subaru Legacy.
EDIT: from comments. The pistons & slider pins move well. Each calliper has two pistons, dust boots intact. The noise is linked to the brake pedal & only happens whilst stopping on hot brakes at very low speed after changing out the parts described above.
EDIT: There is no vibration through the car, just the strange noise on hot rotors which may also be known as creep growl or creep groan.