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Home >> BMW >> 1997 >> 740i >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Ignition System >> Engine Control Unit (Ecu) >> Removal & Installation (Z3)
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Removal & Installation (Z3)

ECU is located in box in right rear of engine compartment. Remove ECU box cover. Disconnect electrical connector. Remove ECU. To install, reverse removal procedure.

CAUTION: BMW 3-series vehicles utilize either a Bosch or Siemens ECU. ECUs cannot be interchanged.
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