1998 Cadillac Seville STS V8 Auto 4.6L Petrol · S747 AHT

Corrosion of the braking system and recurring oil leaks represent the primary mechanical risks for this vehicle, as evidenced by the most recent MOT pass on 3 October 2025. While the vehicle has maintained a passing status, the advisory history shows a trend of deteriorating brake components, specifically moving from corroded hoses in 2019 and 2020 to more significant corrosion on the central and offside front brake pipes in the latest inspection. This pattern of advisory notes suggests that while the vehicle remains roadworthy, the integrity of the hydraulic lines is a progressive concern that requires close monitoring to prevent future failures. The recorded mileage of 35,515 miles over approximately 28 years indicates an exceptionally low usage pattern, averaging roughly 1,268 miles per year. Such low annual accumulation often implies the vehicle has spent significant periods stationary, which can correlate with the specific defects observed in the MOT history. For instance, the recurring advisories for binding rear brakes in 2020 and 2022, alongside the corrosion noted on various suspension and brake components, are common mechanical outcomes when a vehicle is not driven frequently enough to clear moisture from the braking system or prevent surface oxidation on exposed metalwork. A prospective buyer should pay particular attention to the braking system and the engine bay during a physical inspection and test drive. The presence of corroded brake pipes and hoses, as flagged in the 2025 and 2020 records, necessitates a thorough check for any signs of fluid weeping or sudden changes in pedal feel. During the test drive, listen for any grinding or scraping noises from the rear wheels, which could indicate that the previously noted binding brakes have worsened, and feel for any sponginess or a soft pedal, which might suggest air or fluid issues within the corroded lines. Furthermore, the persistent advisories regarding non-excessive oil leaks since 2022 require careful scrutiny. You should inspect the engine bay and the underside of the vehicle for fresh oil accumulation or heavy staining that could indicate a worsening leak. The 2024 advisories regarding corrosion on all four coil springs also warrant a visual inspection of the suspension setup; look for heavy scaling or significant loss of material on the spring coils. Any noticeable knocking or clunking sounds when driving over uneven surfaces or speed bumps could indicate that the structural integrity of these springs or the associated suspension bushes has been compromised by the recorded corrosion.