2012 Toyota IQ 1.0L Petrol · FN12 UTF

A 2012 Toyota IQ with 57,170 miles on the clock presents a roadworthiness profile dominated by corrosion concern, set against a background of largely clean MOT results. The most recent test on 3 March 2026 passed, but it carried an advisory for general underbody corrosion, which is the single most mechanically significant item in the record and warrants careful physical inspection given the car's age. Prior to that, the vehicle achieved six consecutive pass entries with no advisories at all, including a clean 2025 test, which suggests the chassis had not previously been flagged for structural degradation. The only failure recorded, on 10 March 2021, was for an ineffective front wiper — a relatively minor functional issue that was not repeated on the immediately following pass on the same date, indicating it was rectified at the test station rather than a symptom of a chronic electrical or linkage fault. The 2020 test did, however, note front brake disc wear and pad thinning, advisories that would be expected to have been addressed in subsequent routine maintenance given the vehicle has covered further mileage since. Annual mileage accumulation averages approximately 4,084 miles per year across the 14-year life of the vehicle, which is considerably below typical usage for a city car of this vintage. This low figure raises two distinct mechanical possibilities: either the car has been used lightly and intermittently, in which case consumables such as brake discs, tyres, and battery may have suffered from prolonged standing, or it has spent extended periods off the road, which can promote corrosion through lack of use and exposure. The underbody corrosion advisory flagged in 2026 is consistent with the latter interpretation, as corrosion progresses whether a vehicle is driven or stationary, and standing use can actually accelerate it through moisture retention. With the record now confirming an active corrosion concern, the mileage profile itself becomes a secondary but relevant consideration when assessing the extent of any remedial work that may be required. For a prospective buyer, the underbody corrosion warrant is the priority inspection item, and a physical examination on a ramp or over a pit is strongly advised before purchase. Specific attention should be paid to the front and rear subframes, suspension mounting points, brake and fuel pipe runs, and the floor pans, as general advisories can mask localised perforation that an MOT tester is not required to fail a vehicle for until it reaches a defined threshold. On a test drive, listen for clonks or knocks from the suspension over uneven surfaces, which can indicate corroded or weakened mounting bushes, and pay attention to any knocking from the brake pedal area that might suggest corroded or binding brake components. Given the 2020 advisory for scored front discs and thin pads, the brake pedal feel should be assessed for judder under firm application, and the steering should be checked for any vibration or pulling that could indicate warped or heavily corroded discs that were not fully replaced. The 2021 wiper failure is unlikely to be of ongoing concern, but verifying that both front wipers clear the screen effectively and that the washer system functions correctly is a sensible precaution. Tyre condition should also be examined closely, as the same 2021 failure entry included an advisory for an inner-edge worn nearside front tyre, which can point to suspension geometry wear or misalignment — relevant items to monitor given the vehicle's age and the general underbody condition now on record. Finally, because low-mileage vehicles of this age are prone to dried perishable components, the buyer should confirm that the brake fluid and coolant have been changed within recommended service intervals, that the 12-volt battery holds charge under load, and that the tyres are not suffering from flat-spotting or sidewall cracking from prolonged standing. None of these items are recorded in the MOT history, but they are the mechanical considerations that align most directly with this particular car's usage pattern and age.