In documents posted on the U.S. National Highway Traffic Safety Administration website, BMW said the recall of certain model year 2005 to 2008 Mini Cooper and Mini Cooper S cars is expected to being on May 1.

BMW said the front passenger seat air bag may not deploy because of a defect in the occupant detection mat. The company said the mat will be replaced in the recall.

The automaker said it has received one report of a minor passenger injury possibly related to the defective mat.

(Reporting by Eric Beech; Editing by Bernard Orr)