Photosensors

The mirror has a photosensor attached on both the front and back sides. During nighttime driving, these sensors detect distracting glare from vehicle headlights behind you and automatically dim the mirror to eliminate glare and preserve your vision. For this reason, use care not to cover the sensors with stickers, or other similar items. Periodically wipe the sensors clean using a piece of dry soft cotton cloth or an applicator.
Photosensors

The mirror has a photosensor attached on both the front and back sides. During nighttime driving, these sensors detect distracting glare from vehicle headlights behind you and automatically dim the mirror to eliminate glare and preserve your vision. For this reason, use care not to cover the sensors with stickers, or other similar items. Periodically wipe the sensors clean using a piece of dry soft cotton cloth or an applicator.

    See also:

    Auto-dimming mirror/compass with HomeLink® (if equipped)
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    Precautions against vehicle modification
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    Trunk light (Legacy)
    1. Push both sides of the light cover, and then remove the cover by pulling it out. 2. Pull the bulb out of the socket. 3. Install a new bulb. 4. Reinstall the cover. ...