The BMW N43B20 is a 2.0 L (1,995 cc, 121.7 cu·in) straight-four natural aspirated four-stroke liquid-cooled internal combustion gasoline engine, manufactured by Bayerische Motoren Werke AG on the BMW Plant Hams Hall (Coleshill, Birmingham, United Kingdom) 2007 to 2011. A 84.0 mm