the car put itself in Electronic Parking Brake when I open the door, while it is in Drive.

Safety feature to prevent run a way car. Driver cannot simply just wedge a stick and jump out from driver door.

Faulty sensor, is link to the "Infotainment" system and "Driving" system, ... the so called "smart" car, even ask me when I use voice command to open the windows while crusing at 80km/hr... " Are you sure you want to open the window when the car is traveling at 80km/hr.


it is just an anecdote on how much the "smart" car is connected to the driving system. The so called safety system, will also put the car in Parking brakes(in this case electronic parking brake) when you suddenly open the door of the car without putting on the parking brake. So the car does not roll off while you get out of the car, without putting on the electronic parking brake.


All part of the system.it also have auto-hill hold, so at traffic lights, when we come to a stop, the brake is held down for us, after the car is stopped for 1-3seconds. and all that monitoring, is done by sensors. If you safety belt is not clipped, the auto-hill hold does not activate. Certainly, when the auto-hill hold brake is active, if you open the door... also the system switch to Electronic parking brake.


Hence, yes, those door open sensors are working full time and if you do not lock the doors, perhaps the sensor is constantly monitoring the door.


And yes, while the car is off, if the door is opened, it will also warn the passenger or driver that there is vehicle approaching from the back....


All that takes a lot of sensor and battery to keep running. Perhaps that is why it is getting so out of control with the 12 V battery getting used up. That is my 3 sen worth of knowledge after driving the car for 10k km. (M6 driver here)

really? there is a few setting for auto-door locks, maybe he disable it as well? and or auto-power on when door is unlock. I keep those unchecked. but do not know if others keep it running. Open door and the car is ready and prime to move.



and honestly, I do not always try to drive the car with the door open, and the seat belt un-buckled. in the case, where I unbuckle and open the door while car is in "D" mode, directly it auto- engage EPB.


Did the person or the driver seat belt /seat sensor detected the driver is still in the car? *** alot of possiblity for malfunction. or edge cases one.

This post has been edited by skywardsword: May 26 2025, 11:31 PM

Yes, Uncle also prefer a car with Zero safety system, purely use our own innate safety logic in the brain. therefore, I can only tell you as a user of the car, it does do certain things. But you do not need to question me. Go drive the car yourself and do a video on youtube to show the world it is not safe.

aye aye, yes, the car can move, when the driver or any other passenger door is not properly closed. (the auto lock also will not complete its job of locking after the car travel up to speed) sometimes I use the locked led on the side panel to find out yes, one door is slightly ajar.

The thing is after it is properly closed and locked, and in Drive, and we open the door or unbuckle.... the system is monitoring and doing the EPB activation.

Evolving technology. Some drivers can provide Beta test results, while others, just keep bashing only. I can pull a number out of my arse saying 20% of driver do not know how smart their cars are and how dumb it is ... but I digress.

Door sensor maybe 'not so complex ' part of the system.

However, if it is used in conjunction with, Anti-roll away car function. The feedback loop have one more un-relenting output, which is put on the Electronic Parking brake.

Further complexity in the loop, the car also detects the blind spot of the side of the door, being opened (if driver side, it will again give verbal warning) some others have intact, experience automatic braking because the car detected some object in blind spot, meaning the rear guard rail can also play a part in this particular situation.

Therefore if the sensor is giving bad data, and the car reacted to it by applying parking brake... It is an extraordinary situation where by, either, just let the car roll, which is what usually happens, our car with M6 as the car is rolling and door is not properly closed, the car does not pop the Parking brake, but add in another seat belt sensor, when it detects you remove the belt, it will pop the Parking brake.

I believe it is both the seat belt and door open sensor that contributed to this Parking brake issue.


Maybe also the blind spot sensors... A whole host of sensor that just went bonkers.

Telling the car and it just shitz bricks. And quit the job


This post has been edited by skywardsword: May 27 2025, 07:29 PM

Door open signal + Seat belt unbuckle = Activate Electronic Parking brake.

After door open, pull gear selector to Drive, even if seat belt is unbuckled, car can still be driven.

The gist is, while in Drive mode, and a door that was previously properly closed, and the belt that was previously buckled in, both being undone = activate electronic parking brake.



Oh btw, if the normal brake pedal fails, there is even yet another button press that can activate this "electronic parking brake"

Fail and stop running = safe?

Fail and keep running without ability to stop = safe?

Fail and slowly stop = safe?

I believe in all our dreams, we prefer it to fail and still have the ability to specifically tell us, why it is failing and let us slowly glide to a gentle stop.