Owners and mechanics have identified several recurring mechanical issues across various production years of the Ford B-Max. The most critical concern involves the 1.0-liter EcoBoost engine's internal wet timing belt, which can degrade prematurely if oil change schedules are neglected, potentially clogging oil pick-up pipes and causing catastrophic engine failure. Other reported problems include electrical glitches associated with the unique sliding door locking sensors, premature wear on manual clutches, and hesitation or mechanical failures linked to the controversial PowerShift automatic transmission systems.