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14.09.2005: Harness
Before removing the ECU, disconnect the battery or pull the "Trionic" fuse (#28). Move the carpeting away. Unlock ECU harness by pulling the lever and unplug it. Undo a screw in the lower right corner. The ECU slides down.

ECU (engine control unit) replacement on a 1996 900 turbo. The original ECU is being replaced with an upgraded unit from Nordic.


  • 10 mm socket: bolt under the glovebox;
  • Torx T25 screwdriver: glovebox and ECU screws.


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