Buy 2011 Audi S5 4.2L V8 A/T Base Coupe Power Brake Booster. "ATE". 2013-2016, ATE. A4, S4; ATE. ATE. ATE, Body - OEM Audi Part # 8K0612107C (8K0-612-107-C, 8K0612107A)

BrakesERVO. Power Brake Booster.
Power Brake Booster. Vendor:ATE.

Power Brake Booster

Fits A4, A5, allroad, Q5, S4, S5

"ATE". 2013-2016, ATE. A4, S4; ATE. ATE.
Brake Power Booster Unit - Repair or Replace
If you have a brake pedal that is suddenly stiff or you hear a whistling noise when you step on your brakes—especially when you're stopped—the culprit may be a failed brake booster. Our technicians can easily diagnose a possible brake booster failure in your 2011 Audi S5.