RFID tags inside engine bolts? Awesome innovation or tech gone wrong?
GM has used RFID tags in its factories for more than 10 years to identify assembled engines, but now the company is attaching them directly to the cylinder heads and engine blocks using what the company calls a data bolt. Its shaped like a regular bolt and is threaded on one end, but the head is hollow. Inside, secured with epoxy, are a memory chip (or RFID tag) and a coiled metal filament, which acts like an antenna.