E92 pre-lci tail lamp LED

Ants · 06-08-2018, 01:25 PM

Mine has gone out and reading a few threads here it appears those LEDs are built in and cannot be replaced without pulling the tail apart.

My question though.. is it the black electrical unit (that has the bulbs) that powers the LED? I dont see anything on the black unit that has contact points that connect within the unit itself?

Reason I ask - I bought a replacement tail lamp -- I'm thinking I could just connect it to my existing black bulb unit to confirm it all works before I pull the tail lamp out of the car. What do you guys think?

jt335i · 06-08-2018, 01:44 PM

You're better off just swapping the tail lamp assembly with the replacement you got and be done with it.

TemjinX2 · 06-08-2018, 01:47 PM

just check the for sale forums. i've seen pre-lci tail lights go for $60-80

UK_Nomad · 06-09-2018, 05:10 PM

Hi, afraid I don't understand your question (I'm not sure what the black electric unit is that you mention?)

For info - you can test pre-LCI LED lights (on or off the car) without dismantling the light, just connect a 9volt PP3 battery to the brown & blue wires that run from the LEDs to the wiring connector on the light.

Photos here show which wires to use http://www.e90post.com/forums/showthread.php?t=1441049

You can't damage the LEDs with a 9v battery, but if it doesn't work reverse the connections (polarity) and retry.

If you still get no light, assume your LEDs have failed, and buy another light or try to fix yours.

06-08-2018, 01:25 PM	#1
Ants Enlisted Member 1 Rep 39 Posts Drives: 2007 E92 335i Join Date: Jun 2009 Location: ATX iTrader: (1)	E92 pre-lci tail lamp LED - how is it powered? Mine has gone out and reading a few threads here it appears those LEDs are built in and cannot be replaced without pulling the tail apart. My question though.. is it the black electrical unit (that has the bulbs) that powers the LED? I dont see anything on the black unit that has contact points that connect within the unit itself? Reason I ask - I bought a replacement tail lamp -- I'm thinking I could just connect it to my existing black bulb unit to confirm it all works before I pull the tail lamp out of the car. What do you guys think? Last edited by Ants; 06-08-2018 at 01:33 PM..
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06-08-2018, 01:44 PM	#2
jt335i Major 263 Rep 1,225 Posts Drives: 2010 E92 335i Monaco blue Join Date: Jan 2010 Location: Tampa, Fl iTrader: (0)	You're better off just swapping the tail lamp assembly with the replacement you got and be done with it. __________________ 2010 BMW 335i: Monaco blue metallic/Premium+Sport Auto-Steptronic, BMW PE, Cobb Stage 2 2005 Mustang GT: Redfire metallic/5-spd/Ford Racing (Axle backs, silver Bullitt wheels)/K&N CAI/ Diablo Sport Predator Tuner 1997 Toyota Corolla 1983 Mercedes Benz 380SL Roadster
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06-08-2018, 01:47 PM	#3
TemjinX2 Major 521 Rep 1,485 Posts Drives: 2008 335xi e92 Join Date: Dec 2009 Location: Socal OC iTrader: (0)	just check the for sale forums. i've seen pre-lci tail lights go for $60-80
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06-09-2018, 05:10 PM	#4
UK_Nomad Private First Class 44 Rep 103 Posts Drives: 2007 E93 325i Cabriolet Join Date: Oct 2017 Location: South Northumberland UK iTrader: (0)	Hi, afraid I don't understand your question (I'm not sure what the black electric unit is that you mention?) For info - you can test pre-LCI LED lights (on or off the car) without dismantling the light, just connect a 9volt PP3 battery to the brown & blue wires that run from the LEDs to the wiring connector on the light. Photos here show which wires to use http://www.e90post.com/forums/showthread.php?t=1441049 You can't damage the LEDs with a 9v battery, but if it doesn't work reverse the connections (polarity) and retry. If you still get no light, assume your LEDs have failed, and buy another light or try to fix yours. __________________ Ex BMW owner (2007 E93 325i, E36 325i & 328i from the 90's)
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