2011 Mazda 5 2.0L Diesel · YG11 PNN

A pattern of recurring structural and underbody corrosion advisories, combined with a single major and dangerous structural failure in early 2022, defines the mechanical trajectory of this 2011 Mazda 5 across five recorded tests. The March 2026 test was passed but flagged corrosion on integral body structure, persistent oil seepage, thinning brake pads at both axles, and a missing rear passenger seat at the time of inspection. Looking across the record, the structural concerns have not stabilised. A fractured nearside rear subframe was classified as dangerous in March 2022 and required immediate repair before a pass the following day; a corroded rear subframe advisory resurfaced in March 2024; and by March 2026 the corrosion has spread to integral body structure. The underbody of this vehicle warrants close physical examination rather than reliance on advisory wording alone. At roughly 7,919 miles per year over fifteen years, the recorded mileage of 118,789 sits within the typical range for a vehicle of this age and indicates reasonably consistent use. There are no obvious gaps in annual testing, with the earliest record dating to February 2021 and consecutive annual entries thereafter through to March 2026, which suggests the car has remained in regular service rather than being laid up for extended periods. This usage pattern is consistent with gradual wear across consumables and suspension components, and aligns with the steady stream of brake, tyre, and bush advisories logged over the five-year window. No unusual mileage jumps or contradictory readings are evident within the recorded tests. From a buyer perspective, the underbody must be the priority area for inspection given the dangerous subframe fracture in 2022 and the subsequent corroded subframe and body structure advisories. A ramp or pit examination should focus on the rear subframe mounting points, longitudinal seams, suspension arm attachment brackets, and any repair evidence from the 2022 subframe work, paying particular attention to whether the original fractured section was professionally reconstructed or whether corrosion has since re-established around the repair. On a test drive, listen for clonks or rear-end knocks emanating from the rear axle over uneven roads, as these can indicate compromised subframe mounting points, tired suspension bushes, or the worn rear anti-roll bar lower arm bush flagged in 2025. Steering vagueness or excessive body roll through corners would warrant further investigation of the front suspension arm and bush condition. The braking system requires equally focused attention, with advisories for thinning pads and pitted or scored discs appearing in nearly every annual test from 2022 onwards. The wear pattern on the front inner brake discs has been consistent enough to suggest either chronic inner-edge corrosion from limited use of the inner pad surface or repeated pad run-down, so a prospective buyer should measure remaining disc and pad thickness directly and inspect the calipers for smooth operation rather than relying on the advisory thresholds alone. The persistent minor oil leak should be traced to its source, as even non-excessive seepage from an engine or gearbox over several years can mask degrading seals. Finally, the rear tyres flagged for perishing in 2025 and the missing rear seat noted at the 2026 test are both easily verifiable items, but the seat absence may simply reflect a configuration choice, while any tyre older than five years from its production date should be inspected for sidewall cracking regardless of tread depth.