How can I guard against keyless theft?

I have a 2016 BMW 520d with keyless ignition. Can these keys be cloned when in the house allowing the car to be stolen from my drive? If so what measures can I take to prevent this?

Asked on 4 January 2019 by kmm

Answered by Georgia Petrie
Our review of the Monojoy signal blocking bag covers how these types of keyless thefts work and what you can do to prevent them:

If you want a more physical solution to put your mind at ease, I'd take a read of our steering lock reviews. We've tested both the Stoplock Pro ( and Disklok (

If you don't want to pay anything, you can actually just put your keys in a tin with a sealed lid and that sometimes stops the signal being picked up. It's very easy to test, simply put your key in a tin (like an empty biscuit tin) and then walk out to your car. If it doesn't unlock when you're close by then it isn't picking up the signal.
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Value my car