Permanently disabling auto start/stop
To disable the start stop function there is a small black connector attached to the negative terminal of the battery. Unplug this and leave hanging. Start stop will not turn on.
I have done this on my 2020 Defender and 2020 Range Rover Sport and so far after a year no issues. The dealer does once in a while reconnect when I take it in for service though
I have done this on my 2020 Defender and 2020 Range Rover Sport and so far after a year no issues. The dealer does once in a while reconnect when I take it in for service though

I have to say that, after 4 months and 6000 miles of getting used to it, I find the Defender's stop/start system to be the least obtrusive of the many ones I've experienced in other cars in the past. Little or no "shake" when the engine restarts, smooth and near-instant power when you punch it from a standstill, and when you get at a stoploght and the brake hold and engine stop both engage after you come to a full stop, it is blissfully quiet in there (and convenient.)
Took a little getting used to in the beginning and it seems like the system needs a bit of "breaking in" when new, not unlike an adaptive transmission (mine stalled a few times when the car had less than 1000 miles and I hated it too for a couple of days), but now I just let it do its thing and don't mind it at all. I do have the MHEV 6-cylinder engine, which may help smoothing things out.
Took a little getting used to in the beginning and it seems like the system needs a bit of "breaking in" when new, not unlike an adaptive transmission (mine stalled a few times when the car had less than 1000 miles and I hated it too for a couple of days), but now I just let it do its thing and don't mind it at all. I do have the MHEV 6-cylinder engine, which may help smoothing things out.
I have a Range Rover Supercharged and I think it’s a very bad thing for the vehicle and doesn’t improve anything long term in the car. The vehicles are not made to turn on and off so much. It will long term cause early failures in systems and I’d say the only people who like the feature are not real drivers. They are the folks we all always have to pass and belong in the slow lane and have no where to really go. You Should take the bus is my opinion.
European drivers are more courteous, use their intelligence when driving and yield the lane when necessary. Possibly better enforcement? Near zero enforcement here in the US. Having driven in nearly two-thirds of the states, have found Florida drivers to be the absolute worst. I now drive in the right lane most of the time because the remainder of the traffic is all stacked up in the left lane, usually behind some yokel doing under the speed limit in a pickup truck with wheels and tires that probably cost more than the trailer they live in. That’s why they call it FloriDUH.
European drivers are more courteous, use their intelligence when driving and yield the lane when necessary. Possibly better enforcement? Near zero enforcement here in the US. Having driven in nearly two-thirds of the states, have found Florida drivers to be the absolute worst. I now drive in the right lane most of the time because the remainder of the traffic is all stacked up in the left lane, usually behind some yokel doing under the speed limit in a pickup truck with wheels and tires that probably cost more than the trailer they live in. That’s why they call it FloriDUH.
I once heard a comedian say: "There's only two kinds of drivers on the road when I'm out there: Morons and Maniacs. Morons are all the people going slower than me. Maniacs are all the people going faster than me." I rarely see saints on the road. I find humor in both sides of the conversation. Just give me a lonely backroad where I can just do my own thing....
I once heard a comedian say: "There's only two kinds of drivers on the road when I'm out there: Morons and Maniacs. Morons are all the people going slower than me. Maniacs are all the people going faster than me." I rarely see saints on the road. I find humor in both sides of the conversation. Just give me a lonely backroad where I can just do my own thing....
To disable the start stop function there is a small black connector attached to the negative terminal of the battery. Unplug this and leave hanging. Start stop will not turn on.
I have done this on my 2020 Defender and 2020 Range Rover Sport and so far after a year no issues. The dealer does once in a while reconnect when I take it in for service though
I have done this on my 2020 Defender and 2020 Range Rover Sport and so far after a year no issues. The dealer does once in a while reconnect when I take it in for service though

Out of curiosity, I looked in the Workshop Manual and it looks like that little black connector on the battery ground goes to the Battery Monitoring System or "BMS control module". Is this not something that needs to be connected? I'm just honestly curious. These vehicles are electrically quirky enough, I don't want to intentionally cause any problems.
I love this simple way of disabling the auto stop-start, thanks for the tip! It sounds like you've not run into any issues having this unplugged on both vehicles for a year.
Out of curiosity, I looked in the Workshop Manual and it looks like that little black connector on the battery ground goes to the Battery Monitoring System or "BMS control module". Is this not something that needs to be connected? I'm just honestly curious. These vehicles are electrically quirky enough, I don't want to intentionally cause any problems.
Out of curiosity, I looked in the Workshop Manual and it looks like that little black connector on the battery ground goes to the Battery Monitoring System or "BMS control module". Is this not something that needs to be connected? I'm just honestly curious. These vehicles are electrically quirky enough, I don't want to intentionally cause any problems.


