2017 MINI Cooper S 2.0L Petrol · NG17 DTO

A chronic brake and tyre wear pattern defines the mechanical story of this 2017 MINI Cooper S, with both rear brake hose ferrules showing slight corrosion across the two most recent tests and the front brake discs now flagged as worn, pitted or scored on their inner surfaces. The current trend is broadly worsening rather than stable. On 17 June 2026 the vehicle failed its MOT on a dangerous nearside front tyre with tread under 1.6 mm, while simultaneously being issued a pass and the two brake hose advisories, indicating the tyre was rectified on site to enable the pass. Two years earlier the record was clean, so the deterioration is concentrated in the last two test cycles. Two prior rear tyre advisories in 2023, recorded as worn close to the legal limit on both sides, round out a pattern of consumable wear at the axle contact patches rather than any single isolated defect. Mileage of 61,586 across nine years equates to roughly 6,800 miles annually, which sits within the expected band for a car of this age and does not point to either extended standing or high-mileage abuse. The testing history is consistent with regular use, with annual or biennial MOTs from 2020 onwards and no multi-year gaps in testing that would suggest long lay-up periods. The brake hose and disc wear now being flagged is therefore consistent with a vehicle that has covered typical annual mileage and reached the stage where original-equipment hydraulic lines and brake rotors are beginning to show their age. The fact that a dangerous tread depth was only just avoided at the last test, however, suggests tyre rotation or replacement cadence may be lagging behind the wear rate. For a prospective buyer, the immediate priorities are the rear brake hoses and the front brake discs, both of which have appeared as advisories in consecutive cycles. The hose ferrules are the metal crimped ends where the flexible rubber line meets the rigid brake pipe, and corrosion at this point can ultimately lead to brake fluid leakage under pressure, so on inspection the hoses should be examined for any dampness, surface blistering of the rubber, or visible rust weeping from the crimp joint. The front discs should be checked for lip formation on the outer edge, a grooved or scored feel when the wheel is rotated by hand, and any thermal discolouration indicating overheating. On a test drive, listen for any binding that causes the car to pull to one side under light braking, feel for pedal pulsation through the footwell which would suggest disc runout, and watch for any sponginess or excessive travel in the brake pedal that could indicate fluid migration past degraded internal hose cores. The tyre situation also warrants direct attention rather than assumption. With both rear tyres flagged for edge wear in 2023 and a nearside front tyre falling to a dangerous tread depth in 2026, geometry and alignment should be considered a likely contributing factor on a vehicle of this age, particularly given that the Cooper S is sensitive to worn rear trailing arm bushes and bottom arm joint wear which can alter camber. A test drive over uneven road surfaces should be used to listen for any clonking or knocking from the front suspension, any vagueness or wandering from the rear axle, and any steering pull to one side under steady cruising. Under hard cornering, listen for tramlining or follow-the-rut behaviour, which would suggest the rear geometry has shifted. Finally, the cut noted on the offside front tyre in 2025 should prompt a close visual check of all four sidewalls for any bulges, cracking, or exposed cord, as tyres that have been run close to the legal limit on one axle frequently have asymmetric wear that is only apparent on close inspection.