2004 Aston Martin DB9 5.9L Petrol · B8 KBY

Corrosion of the anti-roll bar components and various brake system elements represents the primary mechanical trend for this vehicle, with the most recent test on 26 November 2025 resulting in a pass despite ongoing advisories. While the vehicle has avoided major structural failures in recent years, there is a recurring pattern of degradation involving anti-roll bar linkages and front/rear anti-roll bars, which were noted as corroded but not seriously weakened in the latest inspection. This follows a period of instability in late 2023 when the vehicle failed due to significant issues with the bonnet security and windscreen wiper/washer mechanisms, though these specific items were resolved for the subsequent pass. The recorded mileage of 37,124 miles over a 22-year period indicates a very low annual usage rate of approximately 1,687 miles. Such a low frequency of movement can often lead to the specific types of degradation seen in the MOT history, particularly the perishing of tyres and the corrosion of brake hoses and pipes. When a vehicle is driven infrequently, components such as brake hoses and lines are more susceptible to surface corrosion and moisture retention, as evidenced by the repeated advisories regarding brake hose ferrule corrosion and brake pipe degradation noted between 2020 and 2023. A prospective buyer should pay close attention to the suspension and braking systems during a physical inspection and test drive. The persistent advisories regarding the corrosion of the nearside and offside anti-roll bar linkages and the anti-roll bars themselves suggest that while the corrosion is currently classified as not seriously weakened, it is a progressive issue. On a test drive, listen for any rhythmic knocking, clunking, or rattling sounds when traversing uneven surfaces or speed bumps, which could indicate that the corroded linkages or bushes have developed excessive play. Additionally, the history of pitted brake discs and corroded brake pipes warrants a close visual inspection of the underside for any signs of fluid weeping or advanced scaling on the lines. The braking system should be evaluated for consistency and feel, specifically checking for any pedal judder or pulling to one side, which may relate to the previously noted issues with brake disc wear and hose corrosion. Given the advisories regarding tyre cracking and perishing in 2022 and 2024, the condition of the rubber sidewalls should be scrutinised for deep cracks or age-related hardening, even if the tread depth appears sufficient. Finally, ensure the bonnet mechanism operates smoothly and securely to confirm the major failure from 2023 has been fully rectified and remains stable.