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Lighting Forum
Angel Eyes, DDEs, lighted rings, Clear Turn Signals, LEDs, Xenon, HID, or Bi-Xenon. If it lights up and you want to discuss it, post here!

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Old 01-25-2009, 11:12 AM   #1
GoingNuts
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Dumb rear fog lights

There was fog a couple of weeks ago. So I thought I'd use my fog lights front and rear. One of the rears appeared to be broken. So today I got round to fix it.

Symptoms: left rear fog not working



Ahhh, maybe bulb was blown.



WTF. two bulbs on the right. But only one on the left ???!!!



It's now obvious that was how the rear fogs were supposed to be, and nothing was broken. Feeling a bit sheepish, I looked around to see what else I could do. I found lots of cabling on the trunk lid that could be source of rattles, and the bump-stop for the lid wasn't optimal. So I taped up everything and adjusted everything. Now I am absolute sure there could be no noises from the trunk lid. This wasn't what I set out to do. But it was satisfying fixing up the very last place on the rear of my car that could squeak or rattle.
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Last edited by GoingNuts; 01-25-2009 at 11:16 AM.
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Old 01-25-2009, 11:20 AM   #2
AndrewIndy
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We don't have rear fogs here in the states, but I had a SAAB with a rear fog light (only one), but it was only on the left, not the right. Perhaps, if there are two fog lights it could be confused with brake lights, especially if someone cannot see you well in the fog?
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Old 01-25-2009, 11:35 AM   #3
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Does any one know where I can get the part number for the switch to activate a rear fog. Or is this something I need a more then just a swich for?
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Old 01-25-2009, 11:55 AM   #4
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Audis have 2, BMW has 1 rear fog on the drivers side by design, as you well know now. =]

Quote:
Originally Posted by bimmerboy330 View Post
Does any one know where I can get the part number for the switch to activate a rear fog. Or is this something I need a more then just a swich for?
If you want the OEM switch, and the discrete cluster illumination, you need to get a euro faceplate. Faceplate only. If you have a Sedan, and are in the US, you are SOL (BMWNA sucks) on activating the rear fog if you have adaptive brake lights.

Jason at Tischer (getbmwparts.com) set me up with my new LCM, I did the OEM LED retrofit so I bought the whole assembly. You can, just buy the faceplate though.

You also need a sedan bulb carrier, it has two light sockets. Left for side for LHD, right side like original poster for RHD, or you can dremmel out your coupe one. Carrier was <$15 bucks so I didnt bother to f with the dremmel.

Oh, and depending on the year, you may have to run a wire from your deck lid to pin 49 on your LCM (for coupes).


LCM assembly 61-31-9-133-021 (part is superseded and you only need the faceplate)
Bulb carrier 63 21 7 165 743

I have xenons
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Last edited by Sack; 01-25-2009 at 11:59 AM.
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Old 01-25-2009, 01:33 PM   #5
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I think the original European idea of OEM rear fog is to have ONE REAR FOG LAMP not two. That is simply what you have there or some lazy SOB never finished the complete rear fog DIY. The DIY Rear Fog Light modification that we have here in the USA usually incorporates putting in two rear fog lamp brackets so you get both rear fogs going for the effect.
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Old 01-25-2009, 03:05 PM   #6
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yes it it only one on most cars such as porsche, bmw, and mercedes
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Old 01-25-2009, 03:32 PM   #7
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Quote:
Originally Posted by delmarco View Post
I think the original European idea of OEM rear fog is to have ONE REAR FOG LAMP not two. That is simply what you have there or some lazy SOB never finished the complete rear fog DIY. The DIY Rear Fog Light modification that we have here in the USA usually incorporates putting in two rear fog lamp brackets so you get both rear fogs going for the effect.
Nope, BMW vision was one rear lamp not two. Europe's vision, ECE 38, called for ONE OR TWO rear lamps, required. ECE R48 specifies that the rear fogs must be apart from the brake lights.

Obviously, two lights are better than one for visibility because your brain needs two light sources to triangulate the distance. This is also why cars have two headlights, two tail lights.
In North America, rear fogs are not required but permitted.
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Last edited by Sack; 01-25-2009 at 03:38 PM.
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Old 01-25-2009, 04:24 PM   #8
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Uhm...what is BMW vision and Europe's vision?


EDIT: I'm guessing you mean "version".
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Old 01-25-2009, 09:57 PM   #9
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Quote:
Originally Posted by GoingNuts View Post
There was fog a couple of weeks ago. So I thought I'd use my fog lights front and rear. One of the rears appeared to be broken. So today I got round to fix it.

Symptoms: left rear fog not working



Ahhh, maybe bulb was blown.



WTF. two bulbs on the right. But only one on the left ???!!!



It's now obvious that was how the rear fogs were supposed to be, and nothing was broken. Feeling a bit sheepish, I looked around to see what else I could do. I found lots of cabling on the trunk lid that could be source of rattles, and the bump-stop for the lid wasn't optimal. So I taped up everything and adjusted everything. Now I am absolute sure there could be no noises from the trunk lid. This wasn't what I set out to do. But it was satisfying fixing up the very last place on the rear of my car that could squeak or rattle.
Your car will only have one. BMW use this to identify on what side to overtake the car. With you being in London,thats why it is on the right hand side. There are only a few exception car manufactures who put in two.
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Old 01-25-2009, 10:01 PM   #10
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is there a way to get two back fog lights, a part or anything ,i reckon it looks hot with both on
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Old 01-25-2009, 10:06 PM   #11
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Quote:
Originally Posted by M3_GTR View Post
is there a way to get two back fog lights, a part or anything ,i reckon it looks hot with both on
its oem

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Old 01-25-2009, 10:08 PM   #12
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90% of the time cars only have one rear fog lol..


I really do wish I had a rear fog, that'd be sick.
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Old 01-25-2009, 10:08 PM   #13
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yeah i know, but isnt there a part to change it?
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Old 01-25-2009, 10:15 PM   #14
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Quote:
Originally Posted by M3_GTR View Post
yeah i know, but isnt there a part to change it?
uhm....

Its mad easy!

There is like 3 or 4 DIYs in the DIY section for adding rear fogs to E46 BMWs.
You just need a long wire and the brackets which go for like $10 at the stealership.

SEARCH and ye shall find!
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Old 01-26-2009, 11:20 PM   #15
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Quote:
Originally Posted by delmarco View Post
Uhm...what is BMW vision and Europe's vision?


EDIT: I'm guessing you mean "version".
No I meant vision: an experience in which a personage, thing, or event appears vividly or credibly to the mind, although not actually present, often under the influence of a divine or other agency

Prior to forming the EU code, they had some idea of what they wanted. Sry I cant write it in crayons.
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Last edited by Sack; 01-26-2009 at 11:32 PM.
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Old 01-27-2009, 12:25 AM   #16
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maybe im just a retared but im almost positive i have 2 rear fogs on my 03 330i.. ill post a pic tomarrow.
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Old 01-27-2009, 06:11 PM   #17
MARKS330I
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i don't have a rear fog light switch either, they just come on when i urn on my running lights.
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Old 01-27-2009, 06:27 PM   #18
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Those aren't fog lights.
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Old 01-27-2009, 08:29 PM   #19
MARKS330I
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oh, my bad ill shut up now
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Old 01-27-2009, 09:29 PM   #20
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I hate rear fog lights. All it does is to cause glare and anoy other drivers.
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