Shop OEM BMW Part # 34336883988 (34-33-6-883-988). Power Brake Booster. 2.0 liter, w/o M sport brake. W/O XDRIVE 30EX, 2.0 liter, w/o M sport brake. X3; 2.0L; w/o M Sport Package. X4; 2.0L

Booster. Brake. Power. Repair Kit UN.
Exc.For Blue Painted Caliper. Exc.For Painted Caliper. Part has related component that cannot be reused/reinstalled; mount gasket. Power Brake Booster.

Power Brake Booster

Fits X3, X4

2.0 liter, w/o M sport brake. W/O XDRIVE 30EX, 2.0 liter, w/o M sport brake. X3; 2.0L; w/o M Sport Package. X4; 2.0L; w/o M Sport Brakes.
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 .