The BMW 7 Series E65/E66 generation, launched in 2001, marked a significant departure from its predecessor, the E38. Its controversial 'Bangle Butt' design, penned by Chris Bangle, initially divided opinion but eventually set new design trends. More importantly, it introduced BMW's iDrive infotainment system, a revolutionary but often criticized interface at the time. The E65 (standard wheelbase) and E66 (long wheelbase) were technological showcases, featuring advanced electronics, active suspension (Dynamic Drive), and a host of luxury amenities. While offering unparalleled comfort and driving dynamics for its era, its complexity has made it a challenging car to own in the long term, particularly as it ages. Overall, it's a car that offers immense luxury and performance for the money on t
The BMW 7 Series E65/E66 is a car that offers an incredible amount of luxury, performance, and technology for its current used market price. However, it is not a car for the faint of heart or those on a tight budget. Its complexity, particularly the early iDrive system and the myriad of electronic modules, means that electrical gremlins are common. The petrol V8 (N62) engines are notorious for expensive oil consumption issues (valve stem seals) and coolant leaks. The diesel engines, while offering better fuel economy, are not without their own set of expensive problems, notably swirl flaps, DPFs, and turbochargers, especially on the more complex V8 diesels. For the diesel-focused buyer: The 730d (M57) is the most sensible choice. Its inline-six engine is generally more robust and less complex to repair than the V8 diesels. Ensure swirl flaps have been addressed (deleted or replaced with blanks) and that the DPF is in good health. Regular, high-quality oil changes are paramount. The 740d/745d (M67 V8) offers impressive performance but comes with significantly higher risks and repair costs due to its doubled complexity. It's best reserved for enthusiasts with a substantial maintenanc