Fisher99
Posts: 356
Joined: Sun May 12, 2019 6:24 pm

Red LED on Dash

Wed Dec 02, 2020 1:29 pm

I've searched my manual but can't find a description of the little red LED in the middle of the dash. Sits on the same plane as the HVAC fan controls. To the right of the fan controls and to the left of the passenger vent control.
2014 BMW i3 with Range Extender Engine, Capparis White/Frozen Black, 20" wheels,, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, TurboCord EVSE

GoldiE46
Posts: 17
Joined: Wed Dec 02, 2020 9:43 am
Location: District of Columbia

Re: Red LED on Dash

Wed Dec 02, 2020 7:12 pm

this one, right?
Image

Image

I am also wondering the same

Fisher99
Posts: 356
Joined: Sun May 12, 2019 6:24 pm

Re: Red LED on Dash

Wed Dec 02, 2020 7:36 pm

Yes, that's the one. I've looked in my paper manual and also the online manual, and while the LED shows in the pics of the dash, there's no explanation of what it's for.
2014 BMW i3 with Range Extender Engine, Capparis White/Frozen Black, 20" wheels,, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, TurboCord EVSE

EvanstonI3
Posts: 19
Joined: Tue Nov 03, 2020 9:11 pm

Re: Red LED on Dash

Wed Dec 02, 2020 8:09 pm

Ask it to Open the Pod Bay Doors and see if you get a response.
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Pahaska
Posts: 63
Joined: Thu Jul 30, 2020 11:49 am

Re: Red LED on Dash

Wed Dec 02, 2020 8:50 pm

It is not a LED. It is the cabin temperature sensor.

GoldiE46
Posts: 17
Joined: Wed Dec 02, 2020 9:43 am
Location: District of Columbia

Re: Red LED on Dash

Thu Dec 03, 2020 10:27 am

Pahaska wrote:
Wed Dec 02, 2020 8:50 pm
It is not a LED. It is the cabin temperature sensor.
interesting. it seems that you are correct. thanks pahaska

jadnashuanh
Posts: 5149
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Red LED on Dash

Thu Dec 03, 2020 10:49 am

It could be a light intensity (photo sensor). During the day, place your finger over it and see if the display brightness changes. If they get dimmer, it's not a temperature sensor.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV
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eNate
Posts: 537
Joined: Mon Sep 09, 2019 5:33 pm

Re: Red LED on Dash

Thu Dec 03, 2020 10:55 am

jadnashuanh wrote:
Thu Dec 03, 2020 10:49 am
It could be a light intensity (photo sensor). During the day, place your finger over it and see if the display brightness changes. If they get dimmer, it's not a temperature sensor.
The photosensor for the insturment & screen dimming is on the bottom center of the speedometer display, in line with the lower row of illuminated warning icons.

This one in question looks more like an IR receiver. Vehicle cabin temp sensors usually have a grated opening ; I've never seen one with a lens.
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Fisher99
Posts: 356
Joined: Sun May 12, 2019 6:24 pm

Re: Red LED on Dash

Thu Dec 03, 2020 11:41 am

I just checked and it's not the sensor for diming the dash lights. As Nate says, that sensor is on the main instrument cluster screen. The more I look at this the more it looks like just a little plastic cap that BMW decided to put on the dash just to make people wonder what it is. And if so, it is certainly working! :D

Seriously though, it must have a function. If I had a BMW dealer close by I'd stop and ask them. If It is indeed an IR receiver (and it does look like it could be), I can't imagine what for.
2014 BMW i3 with Range Extender Engine, Capparis White/Frozen Black, 20" wheels,, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, TurboCord EVSE

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MKH
Gold Member
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Joined: Fri Nov 02, 2018 5:48 am
Location: Dallas

Re: Red LED on Dash

Fri Dec 04, 2020 7:34 am

I asked my Dealer about this some time ago. According to their Service Manager, (as several people already posted) it is the cabin temperature sensor - he said it is an IR (Infrared) sensor by design so that the cabin temp. readings cannot be thrown off by heat from the sun shining on the dash/sensor.
Mark H.
2015 i3 Rex, Capparis White, Tera World, Technology & Driving Assistant, Parking Assistant, Harman Kardon Audio System, 19 inch 427 wheels, EVoInnovate EVSE

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