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What does the symbol on my side mirror mean?

The symbol on your side mirror is likely a blind spot indicator, also known as a blind spot monitoring system. This feature is designed to alert you when there is a vehicle in your blind spot, helping to improve safety and prevent accidents when changing lanes or merging.


Understanding Blind Spot Indicators


Blind spots are the areas around your vehicle that are not visible in your rearview or side mirrors. These blind spots can be particularly dangerous, as other vehicles or objects in these areas may not be seen, increasing the risk of collisions. Blind spot indicators use sensors or cameras to detect when another vehicle is in your blind spot and provide a visual or audible warning to alert you.


Common Blind Spot Indicator Symbols


The most common symbol for a blind spot indicator is a small triangle or arrow, often illuminated, located on the side mirror or near the side of the vehicle. This symbol indicates the presence of a vehicle in your blind spot. Some vehicles may also have a light or icon on the dashboard or A-pillar to provide additional visual cues.


How to Use Blind Spot Indicators Effectively



  • Check your mirrors: Always check your rearview and side mirrors before changing lanes or merging to ensure no vehicles are in your blind spots.

  • Respond to the warning: If the blind spot indicator light or symbol illuminates, check your blind spot visually before proceeding with your lane change or merge.

  • Adjust your mirrors: Ensure your side mirrors are properly adjusted to minimize blind spots. This may require some trial and error to find the optimal position.

  • Maintain awareness: Remember that blind spot indicators are not a substitute for visual checks. Always be aware of your surroundings and use caution when changing lanes or merging.


Blind spot indicators are a valuable safety feature that can help reduce the risk of accidents, but they should be used in conjunction with proper mirror adjustment and visual checks to ensure the safety of you and other drivers on the road.

Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.