Main Causes of Automated Headlight Failure in a BMW

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Main Causes of Automated Headlight Failure in a
BMW
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BMW cars use automated adaptive headlights to
improve nighttime and low-light driving and
safety.
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BMW's headlights are commonly referred to as
adaptive headlights because they can move the
light projector to the left or right reflexively
as you drive.
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This allows the driver to see the part of the
road they're turning towards, helping to reduce
accidents and blind spots.
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Some BMW models take this a step further and use
automated LED headlights, which can change their
brightness when faced with oncoming traffic.
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Causes of Automated Headlight Failure
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There are a variety of factors why your BMW's
automatic headlights may fail.
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Some of the common causes are described below.
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Adaptive Headlight Module
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The adaptive headlight module is found under the
headlight housing.
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The main cause of the failure of the adaptive
headlight module is water.
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This can happen for many reasons, such as driving
through heavy rain or flooding or going through a
car wash.
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Headlight Seal
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Your BMW's headlight access door has a seal to
prevent water from entering the headlight.
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It is important to make sure this seal is secure
after replacing or cleaning a bulb.
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You may also suffer the issues that come from
mixing water and electricity.
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Stepper Motor
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The stepper motor is what turns the beam
projector when you corner.
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It is found inside the headlight and is powered
by a control module found underneath the
headlight.
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The motor can become worn out. Its connection to
the projector that it controls can also become
severed.
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Always consult a professional
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It's best to avoid working on your headlights,
aside from general maintenance such as cleaning
and switching out a bulb.
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Poking around with electronic systems when you're
not sure what you're doing is a recipe for
disaster.
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You might end up giving yourself an electrical
shock or causing a chain reaction of short
circuits.
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