Police Are Warning Keyless-Car Owners About a 30-Second Theft Method. Here's the 5-Second Test That Can Stop It.
U.S. police departments from Minnesota to Pennsylvania are telling residents the same thing: store your key fob in a signal-blocking pouch at night. Below, why the threat is real — and how to verify your pouch is doing its job in 5 seconds.
1. Your Key Fob May Still Be Reachable While You Sleep.
If your fob sits near the front door, kitchen counter, hallway hook, or bedroom window, its signal may still be reachable from outside. Modern keyless fobs can broadcast low-power signals even when no one is touching them.
That signal is what your car listens for.
It's also what thieves listen for.
Hasn't this been around for years?Yes. It's growing now because the relay-amplifier devices got cheaper and easier to use. The NICB (National Insurance Crime Bureau) tracks it. Local police departments now publish their own warnings.
2. Relay Theft Doesn't Need Your Keys, Your Alarm Code, or a Broken Window.
The U.S. National Insurance Crime Bureau and local police departments describe the same method, seen in driveways across the country:
- Device 1 sits near the house. It picks up the key fob's signal — through the wall, the door, or a window.
- Device 2 stands next to the car. It relays the signal so the car thinks the key is right there.
- The car unlocks. The push-button start works. The thieves drive away.
- You don't hear a thing. Most owners find out in the morning.
Police departments across the country have documented cases completed in under a minute. The NICB lists relay theft among the fastest-growing methods of vehicle theft today.
U.S. Police Departments Now Warning Residents
- Coon Rapids PD, MN: recommends signal-blocking pouch/container.
- Wauwatosa PD, WI: recommends Faraday boxes or pouches.
- Philadelphia PD, PA: warns about keeping keys within signal range.
- Warrington Township PD, PA: warns about key-fob cloning.
3. Drawers, Foil, and Fob "Sleep Mode" Shouldn't Be Trusted Blindly.
- Drawer Hides the fob, but doesn't block the signal.
- Foil Can work if sealed perfectly, but fails easily with gaps or loose folds.
- Sleep mode Varies by vehicle and settings. Don't assume it works — test it.
Police departments recommend signal-blocking storage because it gives you something simple to verify: put the fob inside, seal it, and try the car door.
4. Low-Cost Pouches Often Fail Where Buyers Rarely Check: The Seal and the Fold.
Many low-cost pouches fail in the places buyers rarely check: the seal, the fold, and the pocket layout.
- Weak closure Pouch looks shut, but isn't fully sealed.
- Wrong pocket Some pouches have one blocking pocket and one non-blocking pocket.
- Fold fatigue Thin shielding can weaken with daily use.
- No retesting Buyers test once, then assume it still works.
The rule is simple: test it monthly. If the car detects the key while it's inside the pouch, don't trust that pouch.
I already bought one from Amazon.Test it tonight, before you decide whether you need a new one. If it still blocks the signal, keep using it. If it doesn't, you'll know in 5 seconds.
5. The 5-Second Test Is the Standard.
- Put the fob in the pouch.
- Seal it fully.
- Pull the door handle — if the car opens, the pouch failed.
Not paranoid. Just in control.
Test it the day it arrives. If your car still detects the key, send it back within 30 days. If the shielding or closure fails within the first year, we replace it.