2012 MINI 1.6L Diesel · SF12 OSG

The vehicle holds a current, valid MOT certificate following a pass on 21 April 2026 at 137,920 miles, but the maintenance trend is currently worsening. The pass came on the same day as a failure, indicating a retest after rectification. Two separate failures occurred within four days of each other in mid-April 2026, both citing a complete loss of recorded effort at the nearside rear parking brake. This is not a minor consumable issue; a single-line braking system recording zero effort points to a mechanical fault at that specific wheel, such as a seized cable, a binding caliper, or a fractured handbrake actuator. The tester also flagged slight corrosion on all four brake hose ferrules and a persistent front oil leak, classified as not excessive but still present. Most critically, the rear sub-frame is corroded. The tester judged it not seriously weakened, yet corrosion on a structural sub-frame at this age and mileage is a progressive condition that demands close monitoring. Mileage accumulation sits at roughly 9,851 miles per year over fourteen years, which is typical for this model and suggests consistent use rather than prolonged standing. The record shows a clean pass on 1 June 2025 at 132,001 miles with zero defects, followed by another clean pass on 17 May 2024 at 124,588 miles. The jump between those two tests is 7,413 miles over eleven months, a slightly lower annualised rate that may reflect lighter use or a change in ownership. The most recent mileage plateau is striking: 137,915 miles on 17 April 2026 and 137,920 miles on 21 April 2026, a gain of just five miles across two tests and a failure. This suggests the car was stationary for repairs rather than being driven between attempts. A buyer should inspect the rear sub-frame in person, focusing on the corrosion noted in the April 2026 test. Surface rust can hide deeper pitting on box sections, and any flaking metal around mounting points would indicate compromised structural integrity. The nearside rear parking brake fault requires a physical check of the secondary brake system: pull the handbrake and verify equal resistance at both rear wheels, and have a garage inspect the cable routing and caliper mechanism for seizure or fracture. The front oil leak, though deemed non-excessive, should be traced to its source, commonly the valve cover gasket or crankshaft seal on this engine, as oil contamination can degrade rubber hoses and brake components. Finally, examine all four brake hose ferrules for corrosion, since corroded ferrules can restrict fluid flow and compromise braking efficiency under load.