Hereare the most common transmission problems reported by 2018 Ford Focus owners. The most common 2018 Ford Focus problems. The most common reliability issues encountered with used 2018 Focuses are: Transmission problems. Cost to fix: $2500; Clutch leaking/fracturing. Cost to fix: $800; Is the 2018 Ford Focus reliable? Yes, Findall the key specs about the Ford Focus Hatchback RS 2.3 EcoBoost 350PS 5d from fuel efficiency and top speed, to running costs, dimensions data and lots more. For The Smarter Car Buyer. 2018) Ford Focus Estate (2011 - 2018) Ford Focus ST (2012 - 2018) Sidebar Left. 6 in 2018, the model with 5-door hatchback body and Line-4 2261 cm3 / 137.6 cui, 276 kW / 375 PS / 370 hp (ECE) of power, 510 Nm / 376 lb-ft of torque, 6-speed manual KAwn.