2005 MINI 1.6L Petrol · RF05 FOU

The MINI passed its most recent MOT test on 8 April 2026, but the result was accompanied by three advisories that warrant careful attention. Two of these relate to corrosion of the front and rear sub-frames, noted as not seriously weakened at the time of test but clearly a developing concern. The third advisory notes an oil leak, though not excessive, which is a continuation of an oil leak first flagged on the previous test in April 2025. The maintenance trend suggests a generally well-cared-for vehicle that is now beginning to show age-related wear in key structural and engine sealing areas. While the absence of any failure items over a five-year MOT record is reassuring and indicates a stable mechanical baseline, the emergence and persistence of these advisories points toward a car whose structural underside and engine gaskets are entering a phase requiring proactive inspection. With 106,902 miles recorded over approximately 21 years, this MINI has averaged around 5,091 miles per year, which is notably below the typical annual mileage for a vehicle of this age and reflects either light regular use or extended periods of standing. Low annual mileage of this nature reduces wear on high-mileage components such as the clutch, drivetrain and major engine internals, but it simultaneously increases the risk of age-related deterioration in items that degrade through standing, inactivity, or calendar age rather than use. Potential buyers should be mindful that the advisory sub-frame corrosion, combined with the low mileage profile, may indicate the vehicle has spent considerable time exposed to damp conditions, short journeys, or partial outdoor storage, all of which accelerate underbody oxidation even when mechanical wear remains modest. Given the recurring oil leak advisory, a prospective buyer should arrange a pre-purchase inspection with the vehicle raised on a ramp to determine the exact source of the leak, which on the R50/R53 MINI commonly originates from the valve cover gasket, oil filter housing, or crankshaft seals. On a test drive, listen for any change in engine note that might suggest oil starvation, watch for blue exhaust smoke on startup or under load, and check the underside for fresh oil residue or staining. The sub-frame corrosion advisories should also be physically inspected, paying particular attention to mounting points, suspension pickup locations, and any areas where the corrosion appears to have spread or perforated the metal, as sub-frame replacement on these models is a substantial undertaking. Gently rocking the car at each corner while stationary can help reveal any play in suspension bushes or worn ball joints, both of which are common wear items on higher-mileage MINIs regardless of recorded mileage. Beyond the recorded advisories, age-appropriate checks are strongly recommended. Tyre sidewalls should be examined closely for perishing and cracking, as rubber compounds degrade with age regardless of tread depth, and a vehicle of this vintage may still be running older tyres with superficially acceptable tread but compromised structural integrity. The 12V battery should be load-tested, as a battery that has spent long periods partially discharged can fail suddenly and is often overlooked on low-mileage cars. Brake discs should be inspected for corrosion pitting or surface lipping from standing, and the calipers should be checked for smooth operation, as seized slider pins are a frequent issue on cars that see limited use. Fluid services, including engine coolant, brake fluid, and gearbox oil, should be verified by service history, since these degrade on a calendar basis rather than purely by mileage, and any gaps in the book should be factored into post-purchase budgeting. Finally, confirm the timing chain condition by listening for any rattle on cold start, as this is a known wear point on early MINIs and can presage a costly repair if neglected.