2015 Citroen C4 1.6L Diesel · KN15 ABU

Corrosion and suspension wear represent the primary mechanical concerns for this vehicle, following a failure in July 2026 that highlighted significant deterioration in the underbody and steering components. While the vehicle passed its most recent test on 25 July 2026, the record shows a clear trend of worsening structural and suspension issues compared to the clean results seen in 2023 and 2025. The transition from no defects in 2025 to multiple advisories and two major failures in 2026 indicates that the vehicle's chassis and suspension components are currently entering a period of accelerated degradation. The recorded mileage of 110,084 miles over approximately eleven years equates to an average annual accumulation of roughly 10,000 miles. This usage pattern is consistent with typical UK driving cycles and suggests the vehicle has not been subject to extreme high-mileage motorway use or long periods of stationary neglect. Mechanically, this level of mileage is consistent with the age-related wear observed in the suspension bushes and anti-roll bar linkages, as well as the progressive corrosion noted on the sub-frame and rear suspension rods. Prospective buyers should pay close attention to the documented corrosion on the front sub-frame and rear suspension rods, as well as the corroded offside rear coil spring. During a test drive, listen for any metallic clunking or knocking sounds when traversing uneven surfaces or speed bumps, which could indicate that the advised suspension arm bushes or the previously failed anti-roll bar linkage ball joints are nearing the end of their service life. Any sudden changes in steering weight or a pulling sensation to one side may indicate that the worn inner suspension arm pins and bushes are impacting directional stability. Further inspection is required regarding the structural integrity of the sub-frame and the condition of the rear coil spring to ensure the recorded corrosion does not progress to a point of serious weakening. The history also shows previous advisories for tyre wear on the edges, so the current tread depth and evenness of wear should be verified to ensure the suspension geometry remains within acceptable parameters. Given the recent major failures on the anti-roll bar linkages, a thorough check of all front-end steering and suspension joints is necessary to confirm that the repairs or replacements following the July 2026 failure are effective.