2009 Toyota Yaris 1.0L Petrol · YC09 RZP

A persistent theme across the MOT record is extensive corrosion on multiple under‑body and brake‑system components combined with recurring tyre safety issues, culminating in a dangerous off‑side rear tyre tear that led to a failure in July 2026. Earlier tests also flagged a fractured front coil spring, a cut near‑side rear tyre and a near‑side rear shock absorber with light oil misting, while every recent test has listed corrosion on the front and rear brake pipes, front sub‑frame mounting areas, rear axle and suspension arm mounting points. The pattern shows that while the vehicle has generally cleared the test after remedial work, the underlying corrosion and tyre degradation have not been fully resolved and are now presenting a safety‑critical defect. With only 47,484 mi recorded over 17 years the annual average mileage sits at roughly 2,800 mi, well below the typical usage for a small hatchback of this age. Such low utilisation often points to periods of limited running or prolonged storage, conditions that can accelerate under‑body rust and moisture ingress, which is reflected in the repeated corrosion advisories. The modest mileage does mean that wear‑items such as clutch discs, CV joints and tyre tread may be relatively fresh, but the corrosion‑related defects suggest that the vehicle has not benefited from the protective effect of regular road heating and cleaning that higher‑mileage cars receive. Prospective buyers should give the tyre condition immediate attention. Inspect the off‑side rear tyre for any cuts, bulges, sidewall cracks or loss of structural integrity and verify tread depth on all four tyres; any sign of damage warrants replacement before a road test. The rear shock absorber on the near‑side shows oil misting – listen for a faint hissing or feel for reduced damping when driving over bumps, and watch for fluid stains under the vehicle, as a leaking shock can compromise ride quality and rear‑wheel alignment. The brake system requires a thorough visual check for corrosion on the front and rear pipes and hoses; look for greenish or black deposits, rust spots, and any signs of fluid leakage, and test the pedal for a firm, consistent feel without sponginess. Given the recurring sub‑frame and axle mounting corrosion, a qualified mechanic should conduct a detailed under‑body inspection, probing the front sub‑frame, rear axle brackets and suspension arm mounting areas for rust penetration, metal thinning or compromised welds. Any excessive rust may necessitate component replacement or professional rust‑treatment to preserve structural rigidity and steering precision. Replacing the corroded brake pipes and hoses, addressing the oil‑leaking rear shock, and fitting a fresh set of tyres will be essential remedial steps before the vehicle can be considered reliably road‑worthy. Budget for these corrective actions and for a post‑repair MOT to confirm that the previously flagged defects have been fully rectified.