MINI Cabrio II (R57) (2008 – 2015)

Reliability score : 5.8/10

The MINI Cabrio II (R57) replaced the first-generation R52, bringing improved refinement, a slightly larger boot, and a new range of engines. While the petrol variants (co-developed with PSA) dominated global sales, the European market received diesel options starting in 2010. These diesel models (Cooper D and Cooper SD) utilized BMW's N47 engine family, offering exceptional fuel economy and strong mid-range torque, making them surprisingly capable cruisers. However, pairing a diesel engine with a convertible chassis is a niche choice, and the agricultural sound of the N47 detracts somewhat from the open-top experience. Furthermore, the R57 generation is plagued by significant reliability issues across both petrol (Prince) and diesel (N47) engine families, requiring meticulous maintenance

✅ Strengths

Exceptional fuel economy on diesel models (often exceeding 55 mpg / 5.0 L/100km)
Strong mid-range punch on the Cooper SD makes it a great highway cruiser
Go-kart handling remains intact despite the convertible roof and heavier diesel engines
High-quality interior design with unique retro styling
Clever 'sunroof' function (roof can open partially at any speed)

⚠️ Weaknesses

The N47 diesel engine is notoriously problematic (timing chain) and expensive to repair
Diesel clatter ruins the acoustic experience of driving a convertible
Very limited boot space and practically useless rear seats
Poor rear visibility when the roof is folded down
Stiff ride quality, especially on larger wheels or run-flat tires
High maintenance costs across all engine variants

🎯 Verdict

Buying a diesel MINI Cabrio (R57) is a highly specific choice that comes with significant caveats. While the Cooper D and SD offer fantastic fuel economy and punchy torque, the N47 engine's timing chain issues make it a financial gamble. Furthermore, the agricultural sound of a 4-cylinder diesel is at odds with the joy of open-top motoring. If you must buy a diesel R57, aim for a late model (2013-2015) Cooper SD with a fully documented service history, and budget for a potential timing chain replacement. For most buyers, a post-2011 LCI petrol model (Cooper N16 or Cooper S N18) is a more logical and enjoyable choice for a convertible, despite their own set of flaws.