Transmission Cases and Pan
WARNING: This page does not describe the selected car, but rather 43 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Made of aluminum alloy, the cases are light weight. The single piece oil pan is made of single wall sheet metal. It includes a drain plug on the bottom surface at the rear. The oil pan is mounted to the main case by 20 bolts. Oil pan sealing integrity is ensured by a controlled compression gasket. Cross tightening is required to ensure an even seal. Final torque of pan bolts is 10-12 N.m. See Fig 1 .