Transmission Identification
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.
As with all BMW transmissions, an identification plate is attached to the transmission housing. The plate provides a two character alpha code signifying identification. Refer to the alpha code when ordering a replacement transmission. This code must be checked against the parts system verifying the code is correct for the specific vehicle and for possible code/part number supersession. See Fig 1 . Alpha codes for the E46 as introduced are "SW" for the 328i and "SX" for the 323i.