2004 BMW 6 Series 645Ci

The 6 Series is BMW's grand tourer, a two-door coupe or convertible that prioritizes long-distance comfort and style over pure sportiness. It's a relaxed cruiser on the highway, but it still feels planted and composed when you push it through corners. Inside, the cabin is snug for four, but the front seats are supportive and the materials feel premium. Electronics like the iDrive system and window regulators can be finicky as the car ages, so it's worth having them checked. The 645Ci is the only trim for the 2004 6 Series, so picking it means you get the coupe or convertible body without needing to choose a pricier or more powerful version. The 4.4L I8 makes 325 horsepower and pairs with a six-speed automatic or manual, sending drive to the rear wheels through rear-wheel drive. An optional Active Steering system sharpens the turn-in at low speeds and adds stability at highway speeds, a rare feature for its time.