2015 Ford Fiesta 1.5L Diesel · AY15 AET

A recurring theme across the MOT record is progressive rear‑suspension and sub‑frame wear combined with corrosion of rear‑mounted components; each year a new advisory appears on the rear coil spring, rear axle swivel pins, sub‑frame bushes or rear exhaust, indicating that the rear structure is the most vulnerable area. The latest test on 19 August 2026 passed, but retained an advisory for a corroded rear coil spring, confirming that the underlying issue has persisted rather than resolved. Earlier advisories on both nearside and offside rear sub‑frame pins, axle swivel pins and a light oil mist from the offside rear shock absorber show a pattern of incremental deterioration rather than isolated incidents. At 71,943 miles the Fiesta averages roughly 6,500 miles per year, a mileage rate that sits comfortably within normal usage for a vehicle of its age. The MOT history shows a consistent annual test schedule with no significant gaps, suggesting the mileage has been accumulated steadily rather than in large, undocumented bursts. Mechanically this level of use typically results in normal wear of consumables such as tyres, brakes and suspension bushings, but the recorded advisories indicate that the rear suspension components have been subjected to enough stress to accelerate corrosion and wear beyond the average expectation for this mileage. When inspecting the car, pay particular attention to the rear suspension and sub‑frame area. Listen for any clunking or knocking noises when driving over potholes or uneven road surfaces, and feel for excessive movement or a loose feeling in the rear wheels that could signal worn axle swivel pins or bushings. A visual check of the rear coil spring for rust patches and the rear exhaust housing for perforations or flaking metal is essential; any active exhaust leak could be hazardous. Verify that the rear registration plate is firmly attached, and test the washer jets to ensure they deliver a steady spray, as misalignment was previously recorded as a failure. Although no brake‑related failures appear in the MOT data, a thorough examination of the braking system remains prudent – inspect pads, discs and hydraulic lines for uneven wear or corrosion, especially given the vehicle’s age. Finally, budgeting for the replacement of the rear coil spring, sub‑frame bushes and possibly the off‑side rear shock absorber should be considered, as these components have been flagged repeatedly and are likely approaching the end of their service life. A test drive that feels stable, with no rear‑end vibration, consistent steering response and no exhaust fumes entering the cabin, will provide the most reliable indication of current roadworthiness.