Introduced in late 2007, the facelifted BMW M6 Convertible E64 LCI brought refined exterior lighting with LED indicators, an updated boot lid with an integrated third brake light, and an upgraded iDrive controller. Under the bonnet remained the extraordinary 5.0-litre S85 naturally aspirated V10 pushing 507 hp at 7,750 rpm. Long-term ownership depends completely on meticulous BMW M6 maintenance, as neglect on an S85 engine can lead to terminal failure.
The high-rpm architecture of the S85 requires preventative replacement of the rod bearings around 80,000 km, as tight tolerances cause accelerated wear. The seven-speed SMG III transmission demands careful monitoring of the hydraulic pump motor, accumulator pressure, and clutch position sensor (PLCD). High-pressure VANOS oil lines and dual throttle actuators must also be checked for preventative renewal.