# 2012-2018 BMW 640d Gran Coupe This sleek four-door coupe combines BMW's elegant design with a potent 3.0-liter turbocharged diesel inline-six producing around 313 horsepower. The Gran Coupe's swooping roofline and frameless doors deliver genuine head-turning presence while maintaining surprising rear-seat space. Reviewers praise its effortless torque, refined highway cruising, and remarkable fuel economy for the performance level—often achieving 30+ mpg. The chassis balances comfort with dynamic capability, though some critics note it's less sharp than smaller BMWs. It's infamous for complex, expensive-to-maintain technology and electrical gremlins as it ages. Diesel emissions concerns also shadow its reputation. **Best suited for:** Executives and enthusiasts wanting a distinctive, efficient grand tourer for long-distance highway driving. Today, it offers compelling used value for those comfortable with premium maintenance costs and diesel ownership considerations.
The 640d Gran Coupe requires premium diesel fuel and expensive synthetic oil changes. Common issues include diesel particulate filter clogging ($2,000-3,000), turbocharger failures, and carbon buildup requiring walnut blasting ($500-800). Insurance costs are high due to luxury classification. Routine maintenance runs 2-3x typical sedans. Parts are expensive and often dealer-only.
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