What's the replacement cost for a 2017 Chevy Volt key fob battery ?

The 2017 Chevrolet Volt uses A3volt CR2032 button cell battery, and as such, it shouldn't cost You more than a couple of dollars to replace. The low end You're looking at is about $1, while the high end still comes in at approximately $5. I'd recommend going with a reputable brand like Energizer or Duracell, as cheap generic batteries can cause damage to sensitive electronics. You can typically find single CR2032 batteries through most major retailers and online, so I'd also recommend skipping the inflated prices of automotive part stores. If You're buying a five pack, You can expect to pay about $2 per battery for the major brands. A single CR2032 will most likely still set You back less than five dollars.