The BMW 4 SERIES CONVERTIBLE (2017-20) M4 2DR CONVERTIBLE 3.0 BITURBO SS 431 EU6 6SPD is a high-performance, four-seat convertible: a premium, niche choice rather than an everyday family car. It pairs open-top appeal with the pace and presence of BMW’s M performance range, sitting above ordinary 4 Series models and competing with sporty luxury convertibles such as the Audi S5 Cabriolet. mycarcheck.com has recorded 17 look-ups covering seven distinct VINs, a modest sample rather than a definitive reliability verdict. Those checks show an average private-sale valuation of £24,800, average recorded mileage of 26,000 miles and roughly 3,000 miles driven annually; cars averaged 3.6 previous keepers. With its powerful turbocharged petrol engine and folding roof, this M4 suits enthusiasts wanting weekend drives and touring, not buyers prioritising low running costs or practicality. Compared with a 4 Series, it delivers an exciting drive; check condition, history and roof operation when buying.