Toyota Prius owners have reported 1 problem related to ignition coils failure (under the electrical system category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Toyota Prius based on all problems reported for the Prius.
Water leaking from engine cowel getting into ignition coils which is causing engine to shudder and stop sometimes too. Seems to be a known Toyota issue yet not being rectified by manufacturer. Seals seem to allow water to get into the ignition coils hence the issue. Vehicle is stationary when first observed then shuddering and misfiring occurring as vehicle is being driven also leading to loss of power as its being driven which is quite dangerous on highways.
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