Faraday Box

[Barnowl1]

I’ve made myself a Faraday box to reduce the risk of my ‘keyless entry‘ keys being scanned. Started with a wooden box 10” x 5” x 4” Lined with 2mm thick lead, ensuring that the lead extended up beyond the lip when closed….didn’t work. So I then lined the lead with tin foil folded 3x times. This worked… for about a week….now it doesn’t. Anyone any ideas why? I’ve heard that Faraday pouches also suffer from the same issue….works for a while then fails…why is this, and what is the solution ?

 

[KennyN]

Seems like a lot of work / effort / money to save yourself £3.

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Our Defender pouches have been defending our fobs for years without issue.

k

 

[Fastcar155]

Hi , my 2015 Mercedes allows me to turn off the key fob.( Need to turn off all keys you have for the car)

 

[merc estate]

Thats funny my faraday pouch has stopped working, seems strange. I see the Defender ones get rated quite well, but does anyone have a better looking thing, they just all look crap.

 

[Deleted member 126251]

Mu

I’ve made myself a Faraday box to reduce the risk of my ‘keyless entry‘ keys being scanned. Started with a wooden box 10” x 5” x 4” Lined with 2mm thick lead, ensuring that the lead extended up beyond the lip when closed….didn’t work. So I then lined the lead with tin foil folded 3x times. This worked… for about a week….now it doesn’t. Anyone any ideas why? I’ve heard that Faraday pouches also suffer from the same issue….works for a while then fails…why is this, and what is the solution ?

Must be a bugger carrying it around....... They can scan your key while it is in your pocket.

AFAIK lead is not an ideal (RF) shield. Copper would be better and if you connect it to ground as well......it will be even better

 

[OneForTheRoad]

Hi , my 2015 Mercedes allows me to turn off the key fob.( Need to turn off all keys you have for the car)

Explain this please , the process of turning off the key. Tnx.

 

[A.J.]

This is the one I use, had it for some time now and seems to do the trick For double protection you can also double click the 'Lock' button too

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[MercedesDriver]

Have these from Amazon and so far so good.
2 Pack Faraday Bag | Car Key Signal Blocking Pouch | Keyless Entry Car Keys Case | RFID Blocker Bag for Car Security
https://www.amazon.co.uk/dp/B07PP1X4MJ/ref=cm_sw_r_cp_api_glt_fabc_BDF9PXMPD5T6ZS4MAH3Y?psc=1
Can’t open the car door even when standing next to it with the key in a pouch so it must be working.

 

[Fastcar155]

Explain this please , the process of turning off the key. Tnx.

Hi , I press the lock button twice in quick sussession and the indicator flashes four times.

Key is turned off , need to do the same to all other keys for your car.

To open use key as normal.

 

[Germgh0st]

I use an old metal Roses tin

 

[Fastcar155]

I use an old metal Roses tin

Or in a micro wave or the fridge !!

 

[chic0821]

I use an old metal Roses tin

I use an old stainless steel container that held tea bags (don't think the make of tea bags matter). Take it out to car & the door does not unlock

 

[Germgh0st]

Modern Mercedes keys go to sleep if they don't move for a while now anyway.

 

[OneForTheRoad]

Hi , I press the lock button twice in quick sussession and the indicator flashes four times.

Key is turned off , need to do the same to all other keys for your car.

To open use key as normal.

I couldn't be ****d on. But tnx .

 

[PhantomF4]

Everyone must have spotted those round tins of travel sweets in garages etc?

They make excellent Faraday containers….

 

[Barnowl1]

Tried my wife’s Hyundai keys in…tins, plant pots, cups, glasses. even tin foil lined lead doesn’t work. Only need it at night time cos that’s when the scroats scan your walls.
Current Merc isn’t keyless, so not an issue for me….yet.

 

[Barnowl1]

Have these from Amazon and so far so good.
2 Pack Faraday Bag | Car Key Signal Blocking Pouch | Keyless Entry Car Keys Case | RFID Blocker Bag for Car Security
2 Pack Faraday Bag | Car Key Signal Blocking Pouch | Keyless Entry Car Keys Case | RFID Blocker Bag for Car Security : Amazon.co.uk: Electronics & Photo
Can’t open the car door even when standing next to it with the key in a pouch so it must be working.

How long have you had it ? Most seems to work for a few weeks then fail.

 

[A.J.]

How long have you had it ? Most seems to work for a few weeks then fail.

Had these almost 18 months and still work perfectly. Can't see how they cease to work frankly

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[whitenemesis]

Failure mode is usually the metal foil membrane splitting through flexing.

 

[MercedesDriver]

How long have you had it ? Most seems to work for a few weeks then fail.

Three months now and still as new