How to Repair Fiat 500 Keys There are a myriad of reasons your Fiat 500 key fob may cease to function. One of the most frequent is the tiny "watch" battery inside it that fails. This is a 3.3-volt lithium CR2032 You can buy it for less than $3. A locksmith is the best source to call if you require a new car key for a classic Fiat model. United fiat 500 key replacement off
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