websterize
Posts: 515
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Location: USA

Rear fog light: A simple question for non-U.S. i3 drivers

Wed Feb 11, 2015 6:03 pm

Which bulb number(s) illuminates after pressing the rear fog button on the light switch? I’m curious how it worked from day one (e.g. no coding). In the U.S., the rear fog switch is omitted from the factory on all BMWs.

Image

Retrofitting the euro switch was plug-and-plug on the E46 and E90 BMW models — assume this is also true on the i3.
Last edited by websterize on Mon Feb 11, 2019 6:37 pm, edited 1 time in total.
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jadnashuanh
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Location: Nashua, NH USA

Re: Rear fog light: A simple question for non-U.S. i3 driver

Wed Feb 11, 2015 8:32 pm

If it's the same as my GT, the bulb is already there, and the Euro switch just illuminated them when they were turned on (and the proper lighting condition was operational). Try going to www.realoem.com and see if the part numbers are the same...you'll probably find out the rear light assembly is the same, just waiting for the proper signal to turn on.

FWIW, I think I remember the i3 has a dual stage brake light functionality...my guess is that that second, high deceleration rate triggers that light, otherwise, if you had the rear fogs on, it would be constantly illuminated.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV
Soon (hopefully!) A 2021 X5 45e will replace the above

SSi3
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Re: Rear fog light: A simple question for non-U.S. i3 driver

Thu Feb 12, 2015 9:45 am

It may also be possible to modify the US-spec switch to activate the rear fog. I did this to my 2010 E91 switch, just had to disassemble it, trim off a couple tabs that were preventing the button from pressing in and voila, rear fogs. It might bug some that it's an unmarked button but saves sourcing and buying an entire euro switch.
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websterize
Posts: 515
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Location: USA

Re: Rear fog light: A simple question for non-U.S. i3 driver

Thu Feb 12, 2015 6:00 pm

SSi3 wrote:It may also be possible to modify the US-spec switch to activate the rear fog. I did this to my 2010 E91 switch, just had to disassemble it, trim off a couple tabs that were preventing the button from pressing in and voila, rear fogs. It might bug some that it's an unmarked button but saves sourcing and buying an entire euro switch.
I suspect you're right. Also suspect that no coding would be required to activate the rear fogs with the existing switch in the U.S. i3s.

http://www.fastm.com/e92m3/rearfog.html
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websterize
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Location: USA

Re: Rear fog light: A simple question for non-U.S. i3 driver

Mon Feb 16, 2015 8:02 am

Anyone (Euro markets)? Bulb number (pretty please) ...
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danix
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Location: SF Bay Area

Re: Rear fog light: A simple question for non-U.S. i3 driver

Mon Feb 16, 2015 8:12 am

It is very likely LED, and already built into the panel. This is likely why the coding is required.

PhilH
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Location: Suffolk, UK

Re: Rear fog light: A simple question for non-U.S. i3 driver

Mon Feb 16, 2015 8:41 am

websterize wrote:Anyone (Euro markets)? Bulb number (pretty please) ...
7
i3 Capparis White; Winter package; Sunroof; LED lights; Ordered 30 May 2014; Delivered 17 October 2014.

websterize
Posts: 515
Joined: Sun Sep 07, 2014 3:39 pm
Location: USA

Re: Rear fog light: A simple question for non-U.S. i3 driver

Mon Feb 16, 2015 8:46 am

Thank you, PhilH.

danix, all rear lighting is LED, according to BMW.

Image

See http://www.kneb.net/bmw/I01/01_I01%20Pr ... tation.pdf (p. 55).
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