MINI Cabrio III (F57) (2015 – 2023)

Reliability score : 8.6/10

The third-generation MINI Convertible (code name F57) marks a major turning point in the model's history. Based on BMW's modular UKL1 platform, it definitively abandons the notorious 'Prince' engines (developed with PSA) in favor of BMW's modular B-series engines (B38 3-cylinder, B48 4-cylinder). This technical change propels the F57 to unprecedented reliability standards for the brand. The model benefited from two facelifts (LCI in 2018 with the arrival of 'Union Jack' taillights and DKG dual-clutch gearboxes, then LCI 2 in 2021 with a streamlined front end). Although rear space and trunk remain symbolic, the quality of finish, driving pleasure ('Go-Kart feeling'), and soft top kinematics (including a sunroof function) make it a benchmark in the premium small convertible segment.

✅ Strengths

Mechanical reliability transformed compared to the R57 generation (BMW B-Series engines)
Exceptional driving pleasure (direct steering, incisive chassis)
Significantly improved interior finish quality (materials, assembly)
Fast soft top kinematics (18s) with very practical 'sunroof' function
Responsive and intuitive iDrive (BMW) infotainment system
Excellent resale value on the used car market

⚠️ Weaknesses

Premature wear of engine mounts (bushings) on petrol versions
Almost zero rear visibility when the soft top is folded
Tiny trunk (160 to 215 liters) and very narrow access
Symbolic rear seats (very limited legroom)
Very firm suspension comfort, especially with 17 or 18-inch wheels
Significant wind noise on the highway

🎯 Verdict

The MINI Convertible F57 is undoubtedly the most accomplished and recommendable generation on the used market. The adoption of BMW engines has eradicated the reliability nightmares of the previous generation. The Cooper (1.5L 136 hp) version represents the most balanced choice for daily use and cruising, while the Cooper S (2.0L) will delight dynamic driving enthusiasts. Purchase is highly recommended, provided the soft top's condition is checked and engine mounts are replaced around 80,000 km. Avoid the rare diesel versions, which are unsuited to the philosophy of a pleasure convertible.

Common issues

Fuites d'huile (joint de cache-culbuteurs, support de filtre à huile) Medium

🔧 80 000 – 150 000 km

💶 300 – 800 €

Vérifier régulièrement le niveau d'huile et l'absence de taches sous le véhicule.

Problèmes de mécanisme de capote (moteurs, capteurs, étanchéité) Medium

🔧 Variable, souvent après 5-7 ans

💶 500 – 2 500 €

Tester la capote avant achat, vérifier l'étanchéité et le bon fonctionnement.

Fuites de liquide de refroidissement (boîtier de thermostat, pompe à eau) Medium

🔧 70 000 – 120 000 km

💶 300 – 800 €

Surveiller le niveau de liquide de refroidissement et la température moteur.

Usure prématurée des supports moteur Low

🔧 60 000 – 100 000 km

💶 400 – 800 €

Attention aux vibrations excessives au ralenti ou à l'accélération.

Estimated maintenance costs

Oil change	£70 – 130
Timing chain	£1 200 – 2 500
Clutch	£750 – 1 400
Complete brakes	£400 – 750
Estimated annual budget	£650 – 1 200

Indicative estimates (independent garage, UK market). Prices vary by region and year.