2009 MINI 1.6L Petrol · PJ59 LZS

Recurring corrosion issues on both subframes combined with an oil leak and a prior emissions failure define the mechanical narrative of this 2009 MINI. The most recent MOT on 2026-07-10 resulted in a PASS, yet the record retains several advisories including rear sub-frame corrosion (5.3.3 (b) (i)), an ongoing oil leak (not excessive), and a past emissions failure marked by an excessive coolant leak (8.2.1.2 (d)). Earlier in 2026, a failed test on 2026-07-07 cited the same coolant leak and rear sub-frame deterioration alongside the earlier front sub-frame weakness noted in the 2023-04-15 failure. While the vehicle now clears its MOT, the persistence of these advisories indicates underlying structural vulnerabilities that were not fully resolved before the latest clearance. The recorded mileage of 97,666 miles across 17 years translates to approximately 5,745 miles per annum, a figure that sits below typical utilisation expectations for a compact hatchback of this vintage. This low accumulation rate suggests the vehicle may have spent considerable time parked or used sparingly, though the irregular spacing between MOTs—ranging from three to twelve months—means the absence of regular professional servicing could have allowed minor issues to compound unnoticed. The gap between the 2023-04-15 failure and the subsequent 2024-05-17 pass spans nearly two years without a MOT, followed by another five-month interval before the July 2026 clearance, indicating inconsistent attention to mechanical health despite the modest mileage tally. Rear sub-frame corrosion appears repeatedly flagged as a non-serious weakening (5.3.3 (b) (i)) and should be inspected for any visible rust penetration or flexing that could compromise ride quality and handling. The front sub-frame also showed serious weakening in 2023-04-15, requiring particular scrutiny of mounting bolts and reinforcement plates for hidden cracks or separation. An oil leak, although described as not excessive in recent tests, warrants visual confirmation beneath the engine compartment for drips or wet spots that might indicate a failing seal or damaged line. Additionally, the 2027 emissions failure linked to an excessive coolant leak suggests the cooling system and exhaust assembly may have sustained thermal stress or contamination that could affect future reliability. During a test drive, pay close attention to whether the steering pulls noticeably to one side when turning, which could signal front sub-frame detachment; listen for any metallic knocking or hopping over bumps that might indicate worn suspension bushings exacerbated by rusted subframe mounts; check the floorboard and undercarriage for fresh oil stains or dampness around the rear sub-frame area; and verify that the cooling system remains free of leaks by observing the engine bay for condensation or liquid pooling, particularly given the history of coolant leakage. These practical checks will help determine whether the residual corrosion and leak issues remain confined to cosmetic areas or have progressed to functional impairment.