CAR Headlight Motor

Headlight adjustment stepper motor: common defects and their signs

  1. Tearing of ball part
    • The headlights do not react to activation of adjustment actuator.
    • Foreign sounds come from the headlights at road irregularities overrunning.
    • A broken element can be seen inside of the headlight.
    • Light beam is directed downwards.
  2. Violation of elements fixation
    • Stepper motor operation sound is heard, but the headlights are not adjusted.
    • Adjustment is performed slower than usually.
  3. Breaking of a lock member, which fixes an inner spring
    • Position of one or both headlights can not be adjusted from inside of the cabin.
    • Headlights beam is directed to the lower end position.
    • Foreign sounds are heard during driving.
  4. Abrasion of a cable or its falling out from rod splines. Usually, at this defect there is no way to adjust the headlights.

How to repair or replace headlight adjustment stepper motor?

Possibility and order of repair depend on location and damage degree. If cable falling out occurred, you need to set it back to its place and fasten the clamp. Sometimes it is necessary to pull out the rod with the help of an adjustment bolt. If the socket is soiled, you need to clean it from dirt and oxides. At breakdown of some elements, like the cable, rod, or dust boot they should be replaced. These actions can be performed on your own, but if you have no experience of such works performing it is recommended to apply to a service station.

At occurrence of significant defects, the headlight incline adjuster should be replaced as a whole unit. It is better to perform this procedure at a service station. In order to replace the part, the negative terminal is disconnected from the battery, then wire connector is removed from the headlight adjustment motor, then the part is turned through 45 counter-clockwise, the high beam light bulb is demounted and the headlight reflector is pulled aside. After this, a defective drive is demounted, a new component is installed into its place and unit assembling is performed in the reverse order. After assembling, headlights incline is adjusted in accordance with car manufacturer’s recommendations.

For various car models there are some differences in the procedure of headlight adjustment stepper motor replacement. Moreover, there are nuances for replacement of the component on the left and on the right sides. Thus, sometimes, in order to gain access to the part, you need to demount the battery or expansion tank. In some cases, you need to remove the front bumper and demount the headlight unit.

Headlight Motor Information

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OEM-Number

99 49 5 63

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OEM-Number

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OEM-Number

6X 09 4 129 5D

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OEM-Number

42 53 6 208

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