2018 DS DS7 1.5L Diesel · LT13 DOM

The most recent MOT test on 2026-04-08 resulted in a clean pass, marking a positive turnaround following a series of failures and advisories in the preceding year. While the vehicle’s maintenance history shows a pattern of recurring issues—particularly with the rear suspension arm components, brake systems, and drive shaft CV boots—there is no evidence of escalating critical failures in the last 12 months. The 2025-04-02 and 2024-04-17 failures highlighted dangerous defects, such as worn suspension arms and severely compromised brake pads, but these have since been addressed, as suggested by the absence of similar warnings in the latest test. However, the persistence of minor defects like deteriorated CV boots and worn brake discs indicates that the vehicle’s wear patterns are consistent with moderate usage, though not yet at a stage where they are imminent safety risks. The recorded mileage of 41,241 miles for a 2018 DS7—approximately 5,155 miles per year—is unusually low for its age, which typically suggests either very light or intermittent use, potentially including extended periods of inactivity. Lower mileage can mask wear from standing, particularly in components like brakes and suspension, where corrosion and binding may develop more rapidly when a vehicle is not driven regularly. The CV boots and suspension arm pins recorded as failed in 2024 and 2025 are particularly sensitive to prolonged idleness, as moisture ingress accelerates deterioration in these rubberized or plastic components. Additionally, the brake pads reaching the 1.5mm threshold in 2024, combined with the low mileage, raises concerns about potential brake system corrosion or standing corrosion on discs and calipers, which can compromise braking efficiency and safety without obvious wear signs. For a prospective buyer, the most critical areas to inspect are the rear suspension arms, brake system, and drive shafts. On a test drive, listen for unusual clunking or rattling noises from the rear suspension, especially when driving over bumps, as this may indicate loose or failing suspension arms. Check for uneven brake pedal travel or a spongy feel, which could signal worn brake pads or degraded brake fluid, and inspect the brake discs for excessive pitting, scoring, or binding—particularly on the near-side rear, where the 2024 failure was noted. Verify that the CV boots on both drive shafts are intact and not leaking fluid, as they may have already been compromised by previous failures. The CV boots should be replaced if they are cracked, split, or leaking, as they can fail catastrophically, leading to drivetrain damage. Beyond the mechanical checks, the low mileage profile necessitates attention to standing corrosion, which can affect structural integrity and fluid degradation over time. Inspect the undercarriage for signs of rust, particularly around the wheel arches, suspension mounts, and exhaust system, as prolonged inactivity can accelerate corrosion in these areas. Check the tyre tread depth on all four tyres, ensuring none are worn to the legal minimum or beyond, and look for sidewall cracks or perishing, which can compromise tyre safety and handling. Given the vehicle’s age and the history of brake advisories, ensure the brake fluid is replaced every two years, as standing brake fluid can absorb moisture and reduce braking performance. Finally, verify the service history for fluid top-ups, particularly the coolant, brake fluid, and power steering fluid, as these should be replaced according to manufacturer recommendations to prevent long-term damage. A thorough inspection of the battery terminals and condition is also advisable, as low usage can lead to a weakened or failing 12V battery.