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What is the root of this BMW design flaw in all 3,5,7 seriesBMW trunk wiring looms?
dpb wrote on Wed, 13 Mar 2013 20:15:16 -0500:
> What's the age of the vehicles and condition of insulation in the area? All the vehicles are five to ten years old'ish. > Are the vehicles in very cold or hot climates and not garaged by any > chance where such degradation could have been accelerated by extremes? The vehicles are all over the world. Same problem everywhere. > Is there preferential failure in any given circuit(s)? Yes. All the wires have been identified and all the circuits involved are implicated variously, e.g., KNOWN LOOM WIRE CONNECTIONS: 01. Red/yellow line = 2 @ x712 -> trunk lid light (positive) 02. Red/black line = 1 @ x1191 Rear lid lock switch (positive) 03. Gray/yellow line = 3 @ 1377 -> tunk lid locking switch (open signal) 04. Brown/gray line = 2 @ x709 -> left license plate light (positive) 05. Gray/Brown line = 4 @ x311 -> zv drive (lid closed) 06. Gray/black line = 2 @ x710 -> right license plate light (positive) 07. Gray/Green -> 4 @ x311 -> zv drive rear lid (positive) 08. White/ Brown line = 3 @ x311 -> ZV to luggage compartment light 09. Brown = 1 @ x709 -> left license plate light (ground) 10. Brown = 1 @ x710 -> right license plate light (ground) 11. Brown = 5 @ x311 -> zv drive ground 12. Brown = 1 @ x1377 -> trunk lid locking switch (open signal) 13. Brown/blue line = 2 @ x1191 Rear lid lock switch (unlock) NOTE: (majority color[s])/(line color)=(pin number)@(connector number -> description Sizes are 0.35mm2===21AWG, 0.5mm2===20AWG, 0.75mm2===18AWG > Perhaps a circuit operating at high capacity relative to wiring > ampacity/insulation rating is aiding in the failure mechanism. Mostly it's the license plate light, the central locking system, and the trunk lid which are affected. > What does BMW say? Same thing BMW always says. Replace the entire trunk wiring loom every five years. BMW Part number: 61116907260 |
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What is the root of this BMW design flaw in all 3,5,7 series BMW trunk wiring looms?
"Arthur" > Same thing BMW always says. > Replace the entire trunk wiring loom every five years. > BMW Part number: 61116907260 > ** Or use silicone coated wire and do it just once. ..... Phil |
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What is the root of this BMW design flaw in all 3,5,7 seriesBMW trunk wiring looms?
Phil Allison wrote on Thu, 14 Mar 2013 16:24:59 +1100:
> ** Or use silicone coated wire and do it just once. Here's a picture of the loom, laid out (on a BMW E46 3-series): http://www.bimmerfest.com/forums/att...4&d=1297298236 |
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What is the root of this BMW design flaw in all 3,5,7 seriesBMW trunk wiring looms?
VinnyB wrote on Thu, 14 Mar 2013 05:24:43 -0500:
>>Replace the entire trunk wiring loom every five years. >>BMW Part number: 61116907260 > > What do they typically charge for such a replacement? Let me guess: > $15,000 That makes sense. Anyone fool enough to by a BMW should be > happy to pay for that fix. These 3,4,5 series BMWs are some of the best handling and safest vehicles on the planet. The M62, M62TU, M54, M52, & M52TU engines are bulletproof, and the suspensions superb. Yet, part of owning a bimmer is fixing it yourself. Otherwise you'll go broke with the repairs. I know of scores who have "repaired" their trunk wiring loom - but I don't know of any who went to the stealer to have it replaced. I was only answering the question of what BMW says to do. We all work on our own vehicles so we repair them ourselves. Cost to "repair" is about $20 give or take - but the real question is why it breaks in the first place. It looks like, from the discussions, a combination of poor choice is insulation plus a badly designed snorkel. |
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