# 2011-2018 BMW 640i Convertible The BMW 640i Convertible represents the sixth-generation 6 Series (F12), offering grand touring elegance with a power-retractable hardtop. Powered by a 3.0-liter turbocharged inline-six producing 315 horsepower, it delivers smooth, effortless performance with a 0-60 mph time around 5.4 seconds. Reviewers praised its refined driving dynamics, luxurious cabin, and striking design, though some criticized its hefty curb weight and less engaging handling compared to smaller BMWs. The complex electronics and retractable hardtop mechanism are known reliability concerns as these vehicles age. It's famous for blending open-air motoring with four-season practicality and sophisticated styling. **Best suited for:** Affluent buyers seeking a stylish weekend cruiser or comfortable long-distance tourer. Ideal for empty-nesters or couples who prioritize luxury and presence over outright sportiness, with budgets for premium maintenance.
The 640i convertible demands premium fuel and costly maintenance at BMW dealers. Common issues include turbos ($3,000-4,000), the complex convertible top mechanism, and electronic gremlins. Expect higher insurance due to theft risk and repair costs. Parts and labor run 2-3x domestic brands. Despite "luxury" image, reliability is average at best.
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