What is this light bulb for?

obriennathaniel · 07-10-2014, 01:17 AM

So I was installing my LED reverse lights and noticed there was another bulb in there. What is it for? I hit my brakes, turn signals, reverse, tried all the light switch settings and it would never light. Any ideas?

euro-r · 07-10-2014, 02:38 AM

emergency brake light

COKen · 07-10-2014, 09:54 AM

I believe it is the light which comes on when you hit the brakes hard. Adaptive Brakelights.

RW Carbon · 07-10-2014, 10:40 AM

I did not know the F30 had that. Good to know

v1k1ng01 · 07-10-2014, 12:03 PM

This is the Rear fog bulb. E9X's were the same way, all the pluming is there all it takes to get it working is a slight modification to the switch and some coding.

obriennathaniel · 07-12-2014, 03:30 AM

Quote:

Originally Posted by COKen

I believe it is the light which comes on when you hit the brakes hard. Adaptive Brakelights.

Quote:

Originally Posted by v1k1ng01

This is the Rear fog bulb. E9X's were the same way, all the pluming is there all it takes to get it working is a slight modification to the switch and some coding.

well which one is it?

I guess its safe to assume it never really comes on so ill just leave it as a filament bulb.

rlmesq · 07-12-2014, 11:14 AM

Quote:

Originally Posted by obriennathaniel

well which one is it?

I guess its safe to assume it never really comes on so ill just leave it as a filament bulb.

Even more confusing: both are correct.

In USA cars, it's the additional brake light that comes on under hard braking.

In euro spec cars, it's the rear fog lamp.

As others have noted, you can get the rear fogs working by 1) modifying the light switch or buying a euro switch and 2) getting it coded to work.

In my e93, no coding was necessary. I just bought the euro switch and plugged it in, and the rear fogs worked.

AWMSPORT · 07-12-2014, 05:25 PM

Rear Fog....Already OEM installed you just have to customize the ligh button , and Code the Car.

AWMSPORT · 07-12-2014, 05:26 PM

Quote:

Originally Posted by rlmesq

Even more confusing: both are correct.

In USA cars, it's the additional brake light that comes on under hard braking.

In euro spec cars, it's the rear fog lamp.

As others have noted, you can get the rear fogs working by 1) modifying the light switch or buying a euro switch and 2) getting it coded to work.

In my e93, no coding was necessary. I just bought the euro switch and plugged it in, and the rear fogs worked.

didnt read b4 i posted.

07-10-2014, 01:17 AM	#1
obriennathaniel @obriennathaniel_f30 on Instagram 515 Rep 1,063 Posts Drives: 582whp/596wtq '13 335i Join Date: Jan 2014 Location: Houston,Tx ig:obriennathaniel_f30 iTrader: (0)	What is this light bulb for? So I was installing my LED reverse lights and noticed there was another bulb in there. What is it for? I hit my brakes, turn signals, reverse, tried all the light switch settings and it would never light. Any ideas? __________________ CG Precision VS-1 Exhaust\DR-1 DownPipe \| PS2 Turbo\Inlet \| PDU PI w/Fuel-it platinum kit & E sensor \| GFB DV+ Diverter Valve \| BM3 w/AIC2-V\|Tune CaryTheLabelGuy \| Full E85 \| ATM FMIC \| ER Chargepipe Inlet/Outlet \| AFE Intake \| BC Coilovers \| PSS 255/40-275/35 Velos Designwerks S3 two piece 19x9/19x10 \| Osram Xenarc \| LED retro \| AWRON digital AC gauge\|
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07-10-2014, 02:38 AM	#2
euro-r Private First Class 34 Rep 131 Posts Drives: 17' BMW X5 \| MSport \| MPPK Join Date: Oct 2013 Location: Vancouver iTrader: (0)	emergency brake light
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07-10-2014, 09:54 AM	#3
COKen Lieutenant Colonel 981 Rep 1,560 Posts Drives: M Rster / Z4 M40i / X5 M50i Join Date: Dec 2013 Location: Colorado iTrader: (0)	I believe it is the light which comes on when you hit the brakes hard. Adaptive Brakelights.
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07-10-2014, 10:40 AM	#4
RW Carbon Captain 185 Rep 821 Posts Drives: BMW F80 M3 & F87 M2 Join Date: Jun 2014 Location: 3941 E La Palma Ave Anaheim CA 92807 iTrader: (1)	I did not know the F30 had that. Good to know __________________ Carbon fiber for the everyday driver: rwcarbon.com 3941 E La Palma Ave Anaheim CA, 92870 info@rwcarbon.com / (714) 328-4406 Instagram/Tiktok/Facebook: @rwcarbon
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07-10-2014, 12:03 PM	#5
v1k1ng01 Second Lieutenant 16 Rep 243 Posts Drives: 2013 335i M-sport Join Date: Mar 2013 Location: Georgia iTrader: (0) Garage List 2013 BMW F30 335i M ... [9.66]	This is the Rear fog bulb. E9X's were the same way, all the pluming is there all it takes to get it working is a slight modification to the switch and some coding.
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07-12-2014, 05:25 PM	#8
AWMSPORT 1ST CLASS AWMSPORT 74 Rep 789 Posts Drives: 13' 328 MSPORT Join Date: Sep 2006 Location: South Fla iTrader: (0) Garage List 2013 BMW F30 328i M ... [0.00] 2007 335i Spt [0.00]	Rear Fog....Already OEM installed you just have to customize the ligh button , and Code the Car. __________________ '13 328i MSport, AW, Black Dakota leather, Premium Pkg, xenons, ///M Perf, side skirts,Front Lip, Fully coded, CF roundels, Matt Black Grillz, Painted reflectors (front & rear) Smoked tail lights, Plazma l.E.D White PY27W front turn signal,trunk spoiler, Matt Black roof, 8K D1S HID,Custom Exhaust,! Soon: JB4,DP,H&R sports,rear diff,!
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