Summary
The BMW 6 Series has 8 recalls spanning 1986 to 2014, with the most serious being a fuel line coupling defect on 2004 eight-cylinder models where a missing retention clip can allow the fuel supply line to separate in a severe frontal crash, potentially causing a fuel leak and fire.
The 2004 model year also has an electrical recall where the positive battery cable's bulkhead connector may have been installed incorrectly, allowing the bolt connection to loosen over time and humidity to accumulate, which can cause current leakage at that junction. Also from 2004, the 645Ci cabriolet and coupe have a sun visor airbag warning label that carries incorrect text, omitting a caution that belongs on vehicles without advanced airbags.
On 2007 models, the front passenger seat occupant detection system can misread a small adult as a child seat and switch off the front passenger airbag, indicated by the "PASSENGER AIRBAG OFF" lamp lighting up, meaning the airbag would not deploy in a crash.
The 2006 model year has two separate issues. The automatic transmission's parking lock mechanism can fail to engage when the selector is placed in Park, allowing the vehicle to roll if parked on a slope without the parking brake applied. Separately, the rear shock absorber lower bushings can loosen within their housings over time and eventually separate, affecting rear suspension stability.
On 2014 M6 Gran Coupe models, the center high-mounted brake light may not be properly secured and can detach while driving, reducing visibility for following traffic and creating a road hazard.
Going back to 1986, the center high-mounted brake light on certain models adds enough electrical load to overheat the brake light switch, melting internal plastic components and potentially jamming the switch in the on or off position.
