Richard Lapthorne has left McLaren just a year after he was appointed non-executive chairman of the group.
Lapthorne joined McLaren in April last year when Ron Dennis decided to relinquish his Formula 1 duties.
At the time, Lapthorne was appointed non-executive chairman of the McLaren Group and a non-executive director of McLaren Automotive.
After just one year, Lapthorne said his job is done.
"We had a full list of issues last April," he was quoted as saying by the Times newspaper. "Ron and the team have been brilliant in working through them and with the road car company poised for a spin-off, my job's done."