1998 Rover MINI 1.3L Petrol · R844 CFU

Chronic subframe corrosion is the defining mechanical story of this Rover Mini, with both front and rear subframes flagged at the most recent test on 16 July 2025 as corroded but not seriously weakened. While this represents an advisory rather than a failure at present, the trajectory is concerning. Just two years earlier, in July 2023, the suspension component mounting prescribed areas on both the nearside and offside front were deemed excessively corroded with significantly reduced structural strength, which resulted in a Major failure on the first attempt. The fact that subframe deterioration is now noted at both ends of the car, only two years after a structural integrity failure at the front, suggests progressive rust that could easily progress to a further Major defect on the next assessment, particularly given the Mini's well-known vulnerability to chassis corrosion penetrating from structural seams and jacking points. Against an age of roughly 28 years, the recorded mileage of 52,432 miles equates to an annual accumulation of only about 1,873 miles, which is notably low. There is a conspicuous testing gap between the 2023 cycle and the 2025 pass, which may indicate a period of standing or limited use. For a classic Mini of this vintage, prolonged periods of inactivity tend to accelerate corrosion in the structural areas already flagged, while short, irregular trips prevent the engine and drivetrain from reaching full operating temperature, encouraging moisture accumulation in the exhaust, oil contamination, and flat spots in tyre sidewalls. The MOT history shows no excessive mileage spikes, meaning the mechanical wear on engine, clutch, and gearbox internals is likely modest, but the structural and rubber-component ageing risk is correspondingly elevated. A prospective buyer should treat the subframe condition as the primary inspection priority. On a ramp or over a pit, examine the front and rear subframes closely for perforating rust, particularly around the mounting points, jacking pads, and where suspension components bolt to the chassis. Tap suspect areas with a screwdriver or small hammer to detect flaky or paper-thin metal, and check that the original structural advisories have not deteriorated into a fail-worthy state. Inspect the suspension component mounting prescribed areas on both front towers carefully, as this is the precise location that failed on the 2023 test. Look for previous repair plates or welded reinforcement, which would suggest remedial work, and probe any filler or underseal with a sharp point to establish whether genuine steel remains beneath. On a road test, listen for clonks or knocks from the front suspension over bumps, which would indicate worn upper arm ball joints given the slight play recorded on the nearside front in 2023, and pay attention to any steering vagueness or wandering that might suggest subframe mounting flex. Check the offside front upper arm joint with equal vigilance, as wear often presents symmetrically. Examine the nearside front outer drive shaft CV boot, which was flagged as severely deteriorated with a loose clip in 2025; with the wheel turned fully to one side, look for fresh grease splatter around the joint and listen for any clicking or knocking under load, which would indicate the boot has failed and contamination has entered the joint. Verify the windscreen washer function as a matter of course given its 2023 failure, and finally, given the low annual mileage, ensure the car reaches full operating temperature on the test drive and check the exhaust for excessive smoke or condensation that could indicate infrequent use rather than a sound mechanical baseline.