The BMW M43 is a straight-4 SOHC piston engine which replaced the M40 and was produced from 1991-2002. Displacement ranges from 1.6 L to 1.9 L. The M43 powered base-model cars, while higher performance models at the time were powered by the DOHC M42 or M44. Compared with its M40 predecessor, it features a dual-path intake manifold (called Individual Control Intake Manifold by BMW) to provide torque across a wider rev range, knock sensing and a timing chain (instead of the M40's timing belt). In 1998 the displacement was increased to 1.9 litres, increasing torque to 180 Nm at 3900 rpm.