2007 BMW 335I: headlights failing or too dim

Filed Apr 24, 2023 · Lights · IL

Vehicles equipped with the Xenon Headlight option that have spent time in warmer climates have very poor quality wiring inside the headlight itself, whose insulation degrades and falls off, exposing bare copper that shorts, causes lighting faults, and disables headlights. This happened in my own car, the driver side headlight Daytime Running Light just stopped working one day, first with no fault codes, then eventually fault codes started appearing as more parts of the headlight stopped working, including the low-beam while driving at night. Obviously the headlights ceasing to work randomly is extremely unsafe on roadways at night, like what happened in my case, but beyond that, wiring shorting inside the headlight can causes electrical fires as well. The vehicle is available for inspection upon request, and has not yet been inspected by the manufacturer, due to testimonials I have heard from many other owners of cars with the same headlights, that BMW dealers and BMWNA are refusing to help at all with this issue. As previously stated, warning lamps did not initially appear, but as more of the wiring insulation began to degrade headlight fault codes did eventually appear.

Filed Mar 11, 2019 · Lights · MO

I know it is a fairly well known issue as looking into a few forums and you can find for yourself. I have a 2007 335i coupe e92 with a around 104k miles and as I know it is far out of warranty the problem I am having should not be something that should happen. Inside of the headlight housing all of the wires start to wither away and short out against each other causing your headlights not to work. This is all happening inside of a sealed unit that isn't supposed to be serviced almost all of the wires coming from the harness are compleatly bare and withered away and I do not have any moisture leaking issues so that couldn't cause any of the problems that are happening either. I believe it is from faulty wiring used inside of the headlights themselves that cause them to deteriorate more rapidly.

Filed Apr 2, 2017 · Lights · 52,650 miles · NJ

The wiring inside the headlight housing is deteriorating. The plastic sheathing has become brittle from the heat, and is falling apart, exposing the conductor. This is creating the risk of an electrical fire or damage to the electrical system.

Filed Nov 8, 2015 · Electrical, Lights · 107,000 miles · TX

Upon car system notification that a headlight malfunction was noted I open the headlight access door on the dynamic projection headlamp to inspect and replace the bulb. At this time I noticed large amounts exposed wiring going from the connector to the main harness. As I continued to inspect the wiring the insulating material around the wires continued to crumble exposing more wiring. This is true for both left and right headlights, both headlamps have sealed access doors and is concerning for.electrical short or fire hazards in/near the high heat generated from.the lamps and or engine compartment.

Filed May 1, 2014 · Electrical, Lights · 77,000 miles · CA

Left headlight control module unit for xenon bulb stopped working on 2007 bmw 335i which caused the low beam xenon headlight bulb to go out at night. Many other bmw owners are reporting the same problem on the same side (left). Type in bmw 335i headlight control module and someone posting that their left side went out, is the first hit on google and many other posts I have seen also state the left side control module failed and their left headlight went out. It is a safety issue and a consumer protection issue as the cost to replace is $1100+.