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What to Do When a Citroen BSI Unit Fails to Send Power Due to Cold Weather

Model: Citroen C4 MK 1 - Years 2004-2010
Part: Control unit

In this video, we see how the Citroen C4 of our YouTuber has trouble starting on a snowy winter day. We can understand the reason. Inside, the dashboard does not light up, and since it is a vehicle with a lot of electronics, we know that everything is controlled by a unit called BSI in Citroen, which our YouTuber has already disconnected. This unit, when very cold, fails to send commands to other components, and usually, bringing it indoors to warm it up is enough to get it working again. However, in this case, the best solution is to replace it, as this workaround has been done too many times.

Updated on 9 September 2026 by ScegliAuto

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by ScegliAuto

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