Krueger collapsed as he was commenting on BMW's latest models during a news conference.
Two men escorted him off stage. Kruger was able to walk.
A BMW spokesman said over the public address system: "I'm a bit lost for words."
BMW CEO Harald Krueger collapses at a presentation during the media day at the Frankfurt Motor Show (IAA) in Frankfurt, Germany, September 15, 2015. Reuters
BMW CEO Harald Krueger (C) is helped after he collapsed at a presentation during the media day at the Frankfurt Motor Show (IAA) in Frankfurt, Germany, September 15, 2015. Reuters
It was the first appearance at a major auto show by Krueger, who took the helm as CEO in May.
BMW later said: "Harald Krueger experienced a moment of dizziness. As a result, the press conference was cancelled in order that Mr Krueger could be examined by a doctor.
“Mr Krueger's health is stable and he is recovering well."
Chief Financial Officer Friedrich Eichiner took over the press roundtable.