Replacing Car Keys It wasn't too difficult to lose your car keys a few years ago. You could go to a locksmith or hardware store to get a replacement key. However, as cars became more sophisticated, keys are becoming more difficult to replace and also more expensive. Depending on the type of key it can cost anywhere from $150 up to $1000 to replace keys. https://www.lottiewilcox.uk/the-how-much-does-a-replacement-car-key-cost-uk-awards-the-most-sexiest-worst-and-the-most-bizarre-things-weve-seen/