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Tips for Replacing the ECU and BSI on Citroen and Peugeot

Model: (Various brands) Various
Part: Control unit

Video tutorial

This video shows how to replace the BSI unit on Citroen and Peugeot vehicles. This is a job that requires experience, so these tips will be very useful.

First, it is crucial to order the correct ECU, referring to the code found on the one you need to replace, as there are many different variants. It is essential to identify the correct code to request from the parts supplier.

When installing a second-hand ECU, it may carry the mileage of the vehicle it came from. It is vital to rely on a good parts supplier to obtain a reliable unit by providing the full chassis number of the vehicle, the mileage, and taking a photo of the ECU and BSI: before working on such a delicate unit, disconnect the battery, and the chip and key of the vehicle should always be replaced.


Updated on 6 October 2026 by ScegliAuto


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