I've just had to have mine replaced at a cost of over £400 including labour. The cause was that on early Mito models, the windscreen drainage channel drips water onto the Alternator eventually causing failure. Alfa are so aware of this fault, that on later models they have added a rubber pipe to take water right through the engine bay onto the road. This pipe only costs £11 and is available to buy and fit to earlier models - needless to say I had this done. Has anyone else experienced Alternator failure without apparent cause?