Which dealer did you go to? The sales rep at Grand Touring downtown told me that all immobilizers void warranty.

I might end up going with whatever gives me a discount from my car insurance. I think Tags is one of them.

 

Canbus atack is protected in our Defenders, it's not a Toyota RAV4..

 

Coventry north.

 

Although I’ve never done it, I’ve often thought about installing a toggle switch which would break a circuit to some part of the starting system, such as maybe adding a relay to the line feeding the starter, or ignition relay. And in my dreamt-up design, hide that simple toggle in an odd, not easily reached or seen place such as under one of the rear seats or passenger side dashboard knee bolster. Figuring that most thieves want a quick entry and driveaway, once they find out that their cloned key fob or whatever device they are using is not going to work, will not spend the time trying other methods and just give up and and take off. I’m thinking that if one is crafty enough, there are tons of places to hide a small rocker switch that would not be easily discovered. Only the owner would know its location and would be able to quickly throw it when leaving the vehicle and flip it back on when re-entering. In my Boxster, I have added a throttle body controller called Sprint Booster which also has an additional feature which allows me to set a PIN code which disables the response from the accelerator pedal. I could literally leave the car running and if someone jumped in and put it in gear and stepped on the gas, nothing happens. Although the car is already equipped with a Millennial Theft Prevention Device, called a manual transmission. Another great feature of this Sprint Booster is a valet mode which when activated, only gives something like 25% power response to the pedal, so that no matter how hard the pedal is stomped the car will only drive at a grandma’s pace. Never used it because I never hand my keys over to a valet. Besides the stories of unscrupulous valets cloning key fobs and finding your address by looking for your registration in the glove box, the sign at the valet stand which says, ‘Not Responsible for Damage or Lost Items’, is my driving force. Nor handing my keys over to some 17-year old only to hear screeching tires as he drives away.

 

I have a RAVELCO anti-theft device installed on both my 1999 & 2018 SuperDuty PU’s. Some folks consider the device (think jet ski plug) as bothersome, but that’s a personal choice. I’m not worried about the Defender as it’s pretty smart. My point is the Magnuson-Moss Act requires the dealer to show how the aftermarket device caused a failure/issue.

 

You always can try this :
https://www.google.com/search?tbm=vi...id:pQqb2k717Sg

 

This is interesting!

 

Just heard about this device which disables the starter relay using hidden switches and unique patterns of pressing the momentary contact buttons. It is called Starter/Stopper and I believe it is a product out of Australia. You can go to starterstopper.com for more information. Seems like a pretty simple, straightforward installation and would make the vehicle nearly impossible to steal, depending on your installation selection, location and number of switches. I will be following this product to see how it fares going forward.

 

the thing is real and used in the field, unfortunately.
JLR DIAG v11 - Diagnostic Key (diagnostic-key.pl)

 

Try any and all of these or….just pay your insurance, park in your garage whenever possible, worry about more important things and remember above all else, its just a car. If it isn’t somehow destined for Barrett-Jackson (and its unlikely any L663’s ever will) then drive it, enjoy it and know that it was built to be used and not placed under glass.