There seems to be alot of houses being broken into and car keys stolen lately. And im wondering how hard anyone thinks it would be to fit a switch hidden somewhere as an imobilizer because no matter how good the alarm is the keys will get you in. Was just a thought just incase.

I've just fitted something for mate who is a police officer.

There's a hidden switch. If you don't activate the switch it cuts the ECU power after 3 minutes.

He'd obviously put some thought into this. He didn't want the thief to find out that the car had a 2nd immobiliser outside his house and come back in to give him (or his wife) a good kicking. Also it gives him time to call the police.

Yeah that kind of idea i had a switch on one of my first cars that was connected to the fuel pump so with the switch off the fuel pump didnt work.

Yeah that kind of idea i had a switch on one of my first cars that was connected to the fuel pump so with the switch off the fuel pump didnt work.

I'd be really interested to know from your friendly officer if the law on these devices has changed as i was seriously looking for an approved version of this idea. I understood at that time these "blackjack" systems were not allowed in the UK? When i enquired I was told categorically that any device that could cut the engine on a moving vehicle was not permitted and invalidated your insurance.

When i was looking into it last year, I was told that there was one product that would work once the car came to a halt or immediately after the engine was started a second time, (can't remember the make now and no one I spoke to ever said they'd fitted one(?)), but the ones that cut out simply after a specific time I was told were only legal in certain US states.

I know his insurance didn't raise any issues and the box had CE/TUV markings. It had a CAN-Bus connection, so maybe it's doing something clever.

I'll try and find out more.

Cool, if you can as it sounds like there is now a prover solution!