Does aluminium foil prevent keyless theft?

To enter my car, one has to use the remote locking key. Is aluminium foil a sufficient way to prevent a theft attempt by someone without the key?

Asked on 28 October 2019 by Christopher Johns

Answered by Georgia Petrie
In theory, aluminium foil which is completely sealed around the key should prevent someone from being able to commit relay theft. However, you can easily test this yourself by locking the car with the key, wrapping the keyfob in foil and then trying to open the car door with the key (in the foil) in proximity to see if the car detects the keyfob. It's a clumsy solution though, better to buy a faraday bag/signal-blocking bag off of Amazon for £7 or £8:
Similar questions
My Audi Q5 was entered recently and I think it was done via cloning my key, which I now keep in a tin box lined with foil. Would the thief retain the code so they could get into my car in future? If so,...
Recently, my daughter couldn't get into her car with the key fob a number of times. She had the car checked by a garage and no problem existed at the time, no battery was changed but the problem went away....
I’ve just bought a Ford Fiesta Vignale. Should I turn off the keyless entry or have the changes made it more secure?


Value my car