2005 Ford Focus C-MAX 1.8L Petrol · DA54 AOB

A persistent concern is the rear sub‑frame corrosion, which has been noted on every MOT from 2023 onward and, while not yet deemed structurally weakened, signals an ongoing exposure issue; compounded by an engine MIL fault that forced failures in both the 2024 and 2025 tests, the vehicle has nevertheless cleared its most recent inspection on 18 May 2026, albeit with tyre‑wear advisories. The pattern shows that the major electronic fault has been addressed sufficiently to pass, yet the corrosion and brake‑wear advisories remain recurring themes that merit close scrutiny. At 103 015 mi the car averages just under 5 000 mi per year, well below the typical usage for a 21‑year‑old model. The low annual accumulation suggests light duty rather than high‑stress operation, which generally reduces wear on engine and drivetrain components. However, prolonged periods of inactivity can accelerate moisture‑related corrosion, particularly to the sub‑frame, and may allow tyre‑wear to become uneven if the vehicle is stored on uneven surfaces. The MOT record shows no gaps in annual testing, indicating the mileage figures are likely reliable and the vehicle has been regularly inspected. Prospective buyers should give the rear sub‑frame a thorough visual inspection for rust penetration, especially around mounting points and the underside of the chassis, and feel for any looseness or clunk when the steering is rocked at a standstill. During a test drive, listen for metallic knocks over bumps and note any steering pull or vibration that could indicate compromised structural integrity. An engine diagnostic scan is advisable to confirm that the MIL fault has been fully resolved; watch for a persistent check‑engine light, erratic idle, loss of power, or unusual exhaust smoke, all of which would suggest lingering sensor or emissions‑control issues. The front brake system also warrants immediate attention: both discs and pads have been flagged as thin and pitted, so measuring disc thickness and checking for surface scoring is essential. Pay particular attention to any pedal pulsation, squealing, or increased stopping distances, which would confirm the need for replacement. The off‑side front inner CV joint boot was recorded as severely deteriorated in 2025; inspect for grease leakage, audible clicking on acceleration, or vibration under load, as a failed boot can lead to joint destruction. Finally, the front tyres were warned as close to the legal limit; confirm tread depth and sidewall condition, and be prepared for tyre replacement before the next MOT.