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Why Does the Fiat 500 Speedometer Flash After Installing a New Radio?

Model: Fiat 500 312 - Years: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
Part: Dashboard

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The issue of the Fiat 500 speedometer flashing after fitting a new radio is common and well-known. It is not a mechanical fault, but an electronic/communication reason; indeed, the Fiat 500 uses the CAN bus network, and all the control units communicate with each other over this network.

The original radio is an active node, and when you install an aftermarket radio, this communication is interrupted. Thus, the instrument cluster interprets this absence as a fault or loss of communication across the entire CAN bus network, signalling it by flashing the speedometer to draw attention; however, the vehicle operates perfectly.

The best solution is to use a suitable CAN bus interface, an adapter that connects between the new radio and the vehicle's original wiring. You can find this device on Amazon with the code B0FG1WPRRY for £37.77 with free delivery.

The installation is plug & play and completely resolves the issue.


Posted on 18 August 2026 by ScegliAuto


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