Faraday Pouches for Car Keys: What Works — and What Fails

A good Faraday pouch blocks your key fob’s wireless signal. But quality matters, £5 Amazon pouches often fail within weeks because the shield lining wears out quickly and/or has poor shield lining. Always test them. The pouch must close/fold fully without gaps. Even on good Faraday pouches the shield lining wears and/or gaps on the close/fold appear – best practice is to replace then annually, or test regularly if over a year old. Testing is simple and quick.

Brands reported to have good shielding include Disklabs, Defender, Mission Darkness (typically £10–£15).

How to test a Faraday pouch for keyless entry/start cars:

1. Put the key in the pouch.
2. Walk up to the driver’s door.
3. If the car unlocks → pouch has failed.
4. Before entering the car put the key in the pouch.
5. Sit in the car with the key still in the pouch.
6. If the car starts → pouch has failed.

How to test a Faraday pouch for keyless start only cars:

1. Unlock the car with the key fob button.
2. Before entering the car put the key in the pouch.
3. Sit in the car with the key still in the pouch.
4. Press the start button.
5. If the car starts →pouch has failed.

Kia supplies a “KiaSafe” case with new keyless models for this exact reason – it’s a faraday pouch.

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