2003 Ford Fiesta 1.4L Petrol · AG52 AHE

The 2022-02-10 failure represents a critical deterioration point following earlier warnings, with the 2022-02-11 pass showing persistent issues rather than resolution. Three distinct advisory categories recurred across both tests: rear brake pipe corrosion requiring repair, offside rear tyres exhibiting cracking or perishing, and exhaust system contamination manifesting as blue smoke during acceleration and elevated CO and hydrocarbon levels after initial warm-up cycles. This pattern of recurring advisories coupled with a complete test failure indicates that underlying mechanical deficiencies were not addressed despite the interim pass result, suggesting systemic problems that persisted through the vehicle's later life stage. With 122,753 miles recorded on a 23-year-old model, the annualisation yields approximately 5,337 miles per year—a figure substantially lower than typical usage patterns for a vehicle of this age. While such low mileage could indicate infrequent driving or extended periods of storage, the presence of active warning items at both the pre-failure and post-failure tests complicates a simple attribution to light use alone. The narrow one-day interval between the failed test on 2022-02-10 and the subsequent pass on 2022-02-11 provides no indication of meaningful progression in the vehicle's condition, instead revealing that the root causes remained unresolved throughout the period leading up to the final failure. The nearside rear brake pipe corrosion flagged in both tests warrants immediate attention during a test drive, as leaking brake fluid can compromise braking performance and introduce contaminants into the hydraulic system. Inspect the fitting for signs of wetness, cracked rubber, or visible fluid seepage, and verify that pedal feel remains consistent without spongy or hard sensations. The offside rear tyres showing damage or cracking should be examined for full tread depth, sidewall integrity, and any signs of uneven wear that might indicate alignment or suspension issues affecting tyre contact patch longevity. The engine management indicators—specifically the motor IL (inoperative) finding alongside elevated CO and HC emission readings—point toward combustion-related faults that likely stemmed from fuel delivery, ignition, or catalytic converter degradation. Listen for abnormal engine noises during operation and monitor the exhaust colour under various load conditions, noting whether blue smoke persists during acceleration or returns to normal after minor adjustments. Given the proximity of the failure to the prior pass, these systems appear to have deteriorated significantly since 2022-02-11, and a comprehensive diagnostic review addressing the brake system, suspension bushings, and powertrain diagnostics would be prudent before considering further investment.