Experts say the thieves are utilizing these key reprogramming tools because they allow the thieves to connect to a key fob's signal.

Nissan thefts What we know: According to a newly-filed search warrant, the Milwaukee Police Department said thieves are now reprogramming key fobs to quickly steal vehicles.

When the battery is removed from the key fob, the fob can lose its ‘memory’ or programming. If the key fob is not working after replacing its battery, a reprogramming procedure may be required.

[Fileark] has instructions for reprogramming keyless entry devices for your car. His demonstration video, which you can see after the break, shows how to make one key fob work for two different veh… ...

If you're looking to pick up a new key fob, or repair one, you might wonder how long programming it takes and whether or not you can do it yourself.

Milwaukee police say Nissan is now the second-most stolen vehicle in Milwaukee. Court records show key reprogramming tools are to blame. "It's definitely gotten worse," Jack Urtek, a Nissan driver ...