The Blind Spot Information System (BSI) in most Honda Civics turns on automatically when the car is running, and you’ll see mirror indicators when a vehicle is detected. If your model includes a dedicated control, you can toggle it there or through the vehicle’s settings.
What the Blind Spot Information System does
The BSI uses radar sensors in the rear corners to detect vehicles in adjacent lanes and alerts you with a visual cue in the corresponding side mirror. In some trims, an audible alert may accompany the visual cue if you signal to change lanes while a vehicle is present. The system generally activates at highway speeds or higher and will disengage if a fault is detected.
Controls and model variations
Control options vary by year and trim. The following options cover common configurations found in recent Civics.
The controls can either be a dedicated switch on the dash near the steering wheel or a setting in the infotainment system. If you can’t locate a switch, the system is typically enabled by default when the car is on and can be managed through the display’s settings.
- Dedicated BSI switch: Look for a small button or toggle on the lower dash near the steering wheel, sometimes labeled with a car-and-radar icon or "BSI." Toggle it to On/Off as needed.
- Infotainment/Vehicle Settings: Open the center display, go to Settings > Vehicle > Driver Assist or Safety, and ensure Blind Spot Information System is enabled. Some models require you to accept on-screen prompts to activate BSI.
- Default-on behavior: If your Civic does not have a BSI switch, the system should be active whenever the car is running and not showing a fault indicator. It may require reaching a minimum speed to engage, typically a highway-speed threshold.
In most Civics, you don’t need to do anything to keep BSI active beyond starting the car; if you don’t see indicators or hear alerts, verify that the system is enabled in the settings or consult a dealer if a fault is suspected.
What to do if the system won't activate
If you’re not seeing any side-mirror indicators or alerts when another vehicle is in your blind spot, try the following:
- Confirm you’re driving above the system’s activation speed threshold and moving in a lane where a vehicle could be in your blind spot.
- Check the dashboard for any BSI or warning icons; a fault message may indicate a sensor issue.
- Review the Vehicle Settings in the infotainment screen to ensure BSI is enabled; some trims require you to turn it on in the menu.
- If the system still doesn’t respond, schedule service to have the sensors and related wiring checked for faults.
Concluding: A malfunctioning BSI should be checked by a Honda technician, as sensor faults or wiring problems can disable the system and affect safety.
Summary
For most Honda Civics, the Blind Spot Information System activates automatically when the car is on, with mirror alerts when a vehicle occupies the blind spot. Some trims offer a manual toggle or a settings option to enable/disable the feature. If you don’t see indicators or hear alerts, locate the switch or adjust the settings in the infotainment system, and seek service if a fault is suspected. Use BSI as a supplement to shoulder checks and safe lane-changing practices.