Mishimoto Expansion Tank for Ford Fiesta ST with Internal Baffles and Sight G...

Mishimoto Expansion Tank for Ford Fiesta ST — Internal Baffles & Sight Glass Upgrade reliability and style with the Mishimoto Expansion Tank engineered specifically for the 2014–2019 Ford Fiesta ST. Built from TIG-welded aluminum, this direct-fit replacement offers greater durability than OEM plastic tanks while improving coolant control and engine-bay aesthetics. Internal baffles prevent coolant starvation by controlling overflow and minimizing slosh during high-speed cornering, hard braking, and rapid acceleration. Integrated sight glass provides clear, quick verification of hot and cold coolant levels without guesswork. Direct-fit design installs in under one hour and uses the stock expansion cap for a clean, OEM-like setup. Optional finishes — available in polished or black powder coat to replace the factory eye-sore and enhance your engine bay’s appearance. Overflow nipple on the fill neck supports an auxiliary coolant tank to meet NHRA requirements. Mishimoto Lifetime Warranty — backed for long-term peace of mind. The Mishimoto Fiesta expansion tank is the practical performance upgrade for owners who want improved coolant management, lasting construction, and a refined engine bay look. Designed and tested to meet the demands of spirited driving while maintaining perfect fitment for your Fiesta ST.