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How to Change the ECU of the Honda Civic

Model: Honda Civic MK 7 - Years 2001-2006
Part: Control unit

This guide explains how to remove and replace the engine control unit (ECU) of the Honda Civic, following the instructions below. First, open the bonnet of your car and disconnect the battery; then unscrew the fixing screws of the ECU, located next to the battery, as shown in the video. Next, disconnect the wiring harness to remove it from the engine bay, replacing it with the new one (install the original ECU); refit it and reconnect, following the video tutorial to the end!

Updated on 9 August 2026 by ScegliAuto

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