Keep your vehicle running smoothly and safely with this Motorcraft A/C O Ring MTCf3659. It serves as an essential part of your car s air conditioning system as it provides a seal and prevents fluid from leaking out and causing damage. It also helps keep the entire system together so that it functions in a stable and efficient manner. This hose o ring is specifically designed for use in Ford Fiesta models from 2011-2017 and is designed to be a direct OEM replacement.