Removal & Installation (Z3)
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 1999 BMW Z3, 1999 BMW M3, 1999 BMW M Roadster, 1999 BMW M Coupe, and 1999 BMW 740iL. 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.