How to Repair Fiat 500 Keys There are a variety of reasons why your Fiat 500 key fob may not function properly. The small "watch" inside the key FOB is often dead. It's an 3.3 volt lithium, CR2032, you can purchase almost anyplace for less than $3. A locksmith is the ideal option to contact if you need a new car key for an old Fiat model. United Locksmith can provide this s
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