# 2012-2018 BMW 640d xDrive Gran Coupe This sleek four-door coupe blends executive luxury with impressive diesel performance, featuring BMW's potent 3.0-liter inline-six turbodiesel producing 313 horsepower and massive torque. The xDrive all-wheel-drive system enhances traction in all conditions. Reviewers praise its striking fastback styling, opulent interior, and remarkable fuel efficiency for a large luxury car—often exceeding 40 mpg on highways. The silky diesel engine delivers effortless acceleration while maintaining refinement. However, critics note the swooping roofline compromises rear headroom and the M Sport suspension can feel firm. It's famous for offering diesel economy without sacrificing performance or prestige, though diesel-gate concerns and emission regulations have since diminished appeal. **Ideal for:** Luxury buyers seeking long-distance comfort, highway cruising efficiency, and distinctive styling. Perfect for executives covering high mileage who prioritize running costs alongside premium appointments. Less suitable where diesel infrastructure is limited.
The 640d xDrive Gran Coupe requires premium diesel fuel and expensive synthetic oil changes. Common issues include turbocharger failures, diesel particulate filter problems, and complex emissions system repairs costing thousands. Parts and labor rates are premium-tier. However, the diesel drivetrain is generally more reliable than BMW's gasoline turbos from this era, contradicting perceptions about diesel complexity.
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