Why does the power stay on after I turn off the car

[SD ///M4]

On my 2006 Z4 M Roadster there is constant power to the cigarette lighter, even when everything is off and the car is locked. I used to keep a USB converter plugged in to power my phone until I went to pull it out one day and discovered it was warm. It completely fell apart in my hand. I plugged in another USB converter with a light on it and discovered that the 12V outlet was always live. Good thing it didn't eventually cause a fire! I ended up finding a hard-wired dual USB outlet designed for marine use and mounted it in the panel below the radio and I have a very short flat USB 3.0 cable to power my Samsung S5.

In my wife's 335is Coupe there isn't a 12V outlet on the console but there is one underneath the glove box above the passenger footwell. It does power off when the car is ignition is off. I use it with a dual USB adapter and a coiled USB/micro-USB cable to power my phone when I'm in her car.

Not sure why BMW isn't consistent with their 12V outlets.

[kinimod]

Don't worry, just leave the car and close it.

The electronics plugged into the cigarette lighter will eventually turn off.

For some reason the car is feeding power into the sockets for a few more minutes, maybe there's some practical explanation behind it but I have not investigated.

I have my radar unit connected and it always gets disconnected after a while.

[Ghetto2315]

Just got my F82 M4 today and it doesn't look like my RD shuts off at all after I lock the car. This pisses me off...

[X2Board]

Originally Posted by Ghetto2315

Just got my F82 M4 today and it doesn't look like my RD shuts off at all after I lock the car. This pisses me off...

It will, you just have to wait a minute or two.

[Mr. Hankey]

If your V1 is powered by the SAVVY unit it will take the car up to 60 seconds to power down the OBD port.

[motex]

Originally Posted by w00tw00t

the cig lighter turns off a while after power off. I don't know how long but I think in about under a minute..

+1 it shuts off after 1 or 2 minutes, I tested it a couple of days ago, so no worries about battery draining

[Cristov9000]

Originally Posted by FrankG5

I had mine coded so the electronics go off when I open the door. I don't lock the car in my garage so for me I prefer everything to go off once I open the door.

I coded the same thing. Do you notice that the dash lights around the cluster stay on after the car is locked? I didn't notice it did that before I coded but I figure it was because I was too busy being pissed the radio was still on. Didn't know if this was some unintended consequence of the coding.

[motex]

Originally Posted by Cristov9000

I coded the same thing. Do you notice that the dash lights around the cluster stay on after the car is locked? I didn't notice it did that before I coded but I figure it was because I was too busy being pissed the radio was still on. Didn't know if this was some unintended consequence of the coding.

100% normal

[silverfox2015]

Originally Posted by FrankG5

I had mine coded so the electronics go off when I open the door. I don't lock the car in my garage so for me I prefer everything to go off once I open the door.

When you say you had it coded, what exactly do you mean. I just purchased my first M3, and it drives me crazy that the electronics (phone, radio, etc.) stay on after you open the door.