What is the power button on the rear view mirror on a Toyota?
It's the switch that controls the auto-dimming feature of the interior rearview mirror, turning it on or off.
What the button does
In most Toyota models, the interior rearview mirror includes an auto-dimming (anti-glare) function. When the feature is enabled, sensors detect bright headlights behind you and automatically darken the mirror to reduce glare. Turning the button off disables this automatic dimming and leaves the mirror at normal brightness. The button itself typically does not affect other mirror features such as the compass or HomeLink, though some trims integrate multiple controls on the same housing.
Labels and placement
The button is typically a small rectangular switch at the bottom edge of the mirror housing, often labeled PWR or Power. However, the exact label and location can vary by model year and trim, so consulting the owner's manual for your specific Toyota is advisable.
How to use it
To toggle auto-dimming, press the power button once. If the mirror seems not to dim at night, the switch may be off or there could be an issue with the sensor or related fuse. If you're unsure, a dealer can verify the system's operation.
Other features on modern Toyota mirrors
Many Toyotas offer additional features on or around the rearview mirror, such as HomeLink garage-door opener controls, a built-in compass, or map lights. These features may have their own controls and are generally independent of the auto-dimming power switch.
Practical tips
If you rely on auto-dimming for comfortable night driving, keep the switch enabled. If glare from certain lighting makes the feature feel intrusive, check that the sensor area on the mirror is clean and unobstructed. For persistent problems, refer to the owner's manual or visit a Toyota service center.
Summary
The power button on a Toyota's interior rearview mirror toggles the auto-dimming function that reduces glare from headlights behind you. It is commonly found on the bottom edge of the mirror and labeled PWR or Power, though exact placement can vary by model year. When on, the mirror dims automatically; when off, it stays bright. Other mirror features, like HomeLink or a compass, are typically separate from this switch.
What does the button on my rear mirror do?
Manual Button on Rear View Mirror
You can find the mechanical control tab on the mirror's bottom. Pushing the manual button in a certain way will engage nighttime driving mode, making everything in the mirror look darker. Moving the control switch the other way will return the mirror to its daytime driving mode.
What is the switch for on my rear view mirror?
It's pretty simple, really. Your rear view mirror glass isn't actually flat – it's a wedge of glass that's thicker on one end than the other. When you flip the switch at the bottom of the rearview mirror, the wedge moves. What this does is change the way light passes through it and how it's reflected back.
Why is there a power switch on my rear view mirror?
The "power button" on a rearview mirror is typically for the auto-dimming feature that reduces glare from headlights at night. When the green light is on, the mirror will automatically dim in response to bright lights. Pressing the button turns this feature off, and the mirror will function like a standard mirror without dimming, which is useful if you have tinted windows and can't see well when it's dimmed.
This video explains what the switch on the rearview mirror is for: 47sMake It Easy MechanicYouTube · Aug 6, 2021
How to use it
- To turn on auto-dimming: Press the button to turn on the green indicator light. The mirror will now automatically dim when it detects bright lights behind you.
- To turn off auto-dimming: Press the button again to turn off the green light. The mirror will no longer dim automatically, which can be helpful in certain situations, such as with very dark window tint.
What the button is not
- Not for garage door openers: Garage door buttons are typically separate and clearly labeled, often on a different part of the mirror or console.
- Not for a rear-view camera display: This is a modern feature that is not controlled by this button.
What is the assist button on my rear view mirror?
Vehicles equipped with the Uconnect Access system feature will contain an ASSIST button on the rear view mirror. The ASSIST button will connect you directly to one of three important Uconnect Care centers for your assistance and support. Uconnect Care – In vehicle support for Uconnect Access System, Apps, and Features.
