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How to Replace the ECU of a Peugeot 307

Model: Peugeot 307 MK 1 - Years 2001-2009
Part: Control unit

If the ECU of your Peugeot 307 has serious operational issues and you need to replace it, this guide is all you need. Read it carefully and apply the instructions provided. First, switch off the vehicle completely. Lift the bonnet and locate the wiring system on the right side. Disconnect all the various cables using the small lever, and once done, lift the entire ECU to remove it completely. At this point, simply insert the new ECU and connect the various cables.

Updated on 23 May 2026 by ScegliAuto

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On the Peugeot 407, the boot may become stuck, possibly due to a problem with the control button or the lock actuator. In such cases, you can perform an emergency opening by following the simple procedure shown in this tutorial. First, open the rear doors, then lower the seat back by operating the release lever. Next, go inside the boot, locate the lock, and manually operate it using a flathead screwdriver. The boot will then be free to open.

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