Quote:
Originally Posted by engatwork
I have had two BMW's come in this week that the wiring insulation for the headlights has already broken down and deteriorated. When you replace the bulb the insulation crumbles as shown in the attached picture. One was a 04 5 series and the other was an 06 3 series. They must have hired that ex Mercedes engineer from 94/95 that came up with the self destructing engine wiring harness.
Personally, the more I work on BMW's the less impressed I am with them.
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Is the entire harness falling apart?
If it's only disintegrating inside the headlamp housing it's probably due to heat. Does the car have daytime running lamps? If so that would accelerate the heat problem since the lights would be on whenever the car was running, day or night.