The 2012 Focus serpentine belt is responsible for transmitting rotational engine power to auxiliary systems like the AC compressor, alternator, and water pump. If the belt breaks, these crucial systems will not work and you will not be able to drive, so it's important to keep an eye out for signs of wear like damaged ribs, abrasions, and cracks. Browse online for 2012 Ford Focus belts and get Free Next Day Delivery or pick up your purchase at the nearest local store.