Related: BMW First to Let You Unlock, Start Your Car With iPhone Digital Key New key fobs must be programmed with codes that the vehicle has to read before it unlocks the door or allows starting ...

If you have a key fob and have ever been curious about the circle arrow button and its function, here's what it means.

A car expert reveals how one can start their car with a dead key fob, even if their car has keyless ignition.