2009 MINI 1.4L Petrol · CE09 DWU

A chronic pattern of exhaust emissions failures combined with persistent under-bonnet oil leaks and tyre perishing advisories defines the mechanical history of this 2009 MINI. The most recent test on 10 August 2024 returned a pass, but it was achieved only one day after a failure on 9 August 2024 for a clearly visible black smoke emission under acceleration and excessive carbon monoxide content at the second fast idle. This is not an isolated event, as an identical carbon monoxide exceedance caused a failure on 18 June 2022, meaning two out of four test events in the recorded window involved exhaust emissions breaches. Across the same window, oil leaks have been flagged at every single test since 2022, both front engine area oil seepage and general non-excessive leakage, indicating an ongoing seep that has not been resolved between tests. Compounding the picture, nearside rear tyre perishing has been recorded on virtually every annual inspection since 2019, with both front tyres also noted as perished in 2024. The latest pass still carried five advisories, covering headlamp lens contamination, nearside and offside front suspension arm pins or bushes, dual front tyre damage, and importantly rear subframe corrosion not deemed serious enough to fail. None of the recorded failures involved braking, structural, or steering defects, but the emissions and oil leakage pattern warrants close scrutiny. Mileage stands at 109,519 recorded miles over approximately 17 years of age, which equates to an annual accumulation of roughly 6,442 miles. This rate is broadly typical for the vehicle's age bracket and does not raise immediate red flags regarding long-term standing or exceptionally high motorway use. However, there is a notable gap in the recorded test history between the July 2019 test and the April 2021 pass, a period of nearly 21 months where no MOT inspection was captured, which on its own is not unusual for a vehicle that may have been declared SORN or otherwise exempt during that window. The mileage progression across the recorded tests, although not stated explicitly in the data, must be assumed consistent with the age and annual rate, and there are no flagged discrepancies in the DVSA mileage record. Mechanically, this moderate annual usage places average demand on consumable items such as brake pads, discs, and tyres, while still permitting age-related deterioration of rubber components, bushes, and exhaust system hardware, all of which is borne out by the advisory pattern. For a prospective buyer, the priority areas for physical inspection are the engine and exhaust system given the dual carbon monoxide exceedance and visible smoke event. On a cold start, observe whether blue or black smoke is emitted from the tailpipe, particularly under hard acceleration, and listen for any ticking or rattling from the exhaust manifold area which could indicate a failing lambda sensor or worn engine internals contributing to the rich running condition. Check the engine bay and underside for the source of the persistent oil leak, focusing on the rocker cover gasket, valve cover, sump plug, and any oil residue tracking down the bellhousing or onto the subframe. The 2024 advisory noting rear subframe corrosion, although not serious at that point, warrants a thorough inspection with a torch for any bubbling or scaling around mounting points, jacking points, and suspension anchor locations, as corrosion on these cars can progress rapidly once initiated. Additionally, the worn front suspension arm pins or bushes flagged on both sides should be checked by hand for excessive play; with the wheel jacked and load relieved, attempt to prise the arm to feel for slack, and on the road listen for clonking or knocking over uneven surfaces, particularly over speed bumps. The tyre perishing pattern across multiple positions indicates that the rubber compound is reaching the end of its service life, and a full set of replacement tyres should be budgeted for regardless of any visible tread. Inspect all four tyres carefully for hairline cracking in the sidewall grooves and between tread blocks, and confirm production date stamps are within the last five years to avoid further early deterioration. The 2022 advisory for an illuminated Tyre Pressure Monitoring System warning light, which has not reappeared in subsequent records, should still prompt verification that the system is currently functional and that all four sensors hold pressure correctly. The headlamp lens product noted in 2024 should be assessed for whether it has worsened into clouding that materially reduces beam output, as MOT criteria on this point can shift between advisories and failures depending on inspector judgement. Finally, given that two failures in the recorded history have both centred on exhaust emissions, any prospective purchase should ideally be accompanied by a pre-purchase diagnostic scan and live emissions check using an approved gas analyser, as the recurring nature of the defect points to an underlying running issue that a simple exhaust replacement is unlikely to resolve in isolation.