Removal & Installation (3-Series - Z3)
WARNING: This page does not describe the selected car, but rather 82 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 745i. However, it is still accessible from the selected car via links, so may be relevant.
PCM is located in box in right rear of engine compartment. Remove PCM box cover. Disconnect electrical connector. Remove PCM. See Fig 1. To install, reverse removal procedure.
CAUTION:
BMW 3-series vehicles utilize either a Bosch or Siemens PCM. PCMs cannot be interchanged.