2017 Citroen C1 1.2L Petrol · F6 DMC

This Citroën C1 has demonstrated a concerning pattern of deferred maintenance over its recent MOT history, with the most recent test on 2026-03-20 showing a failure due to unresolved engine MIL faults despite passing the same day with a series of advisory conditions. The trend is clearly worsening, as the same engine malfunction and front tyre/brake issues recur annually without resolution. The 2025 and 2024 tests reveal identical failures for the MIL and repeated advisories on front brake pads and discs, indicating either a lack of proper diagnostics or persistent neglect. The most recent advisory for front brake pads at 1.1mm thickness suggests imminent failure risk, while the pitted front brake discs—particularly on the inner faces—point to uneven wear likely caused by binding or misalignment. The near-legal-limit tyres (1.8mm–2.5mm) further imply a pattern of delayed replacement, risking hydroplaning and reduced grip. The vehicle’s mileage of 25,385 miles over nine years—approximately 2,821 miles annually—is unusually low for its age, suggesting prolonged periods of inactivity rather than consistent light use. Between the 2024 and 2025 tests, only 922 miles were accumulated over a year, and another 887 miles passed in the following 12 months, reinforcing the likelihood of storage rather than active driving. Such low mileage can exacerbate issues like brake corrosion, suspension stiffness, and battery degradation, as components remain static rather than benefiting from regular motion. The absence of intermediate servicing or maintenance records between tests raises questions about whether critical fluids, such as brake fluid or coolant, have been properly serviced. A prospective buyer should prioritise an immediate inspection of the engine MIL fault, as persistent warnings suggest either a faulty oxygen sensor, catalytic converter deterioration, or a broader emissions-related issue that could escalate into costly repairs. The front brake system warrants thorough examination, particularly the pads (now at critical wear) and discs (pitted and scored), to confirm there is no underlying binding or misalignment causing uneven wear. The near-legal-limit tyres should be checked for uneven tread wear, which could indicate suspension or wheel alignment problems. Given the recurring advisories and the low mileage pattern, corrosion checks on the underbody, wheel arches, and suspension components are essential, as prolonged standing increases rust risk. Finally, the battery and electrical system should be tested, as the MIL fault may stem from intermittent electrical issues rather than purely mechanical failures.