Tempted to save money by DIYing a new key fob or smart key for your car? It could save you hundreds.

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Gizmodo may earn an affiliate commission. Reading time 5 minutes ...

Key fobs are a generally pretty mundane and overlooked piece of automotive paraphernalia. A few decades ago, drivers didn't have a way to remotely unlock their cars, and now it's taken for granted.