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Car Camera Sensors and What They Actually Do

“Sensor” may refer to the imaging chip, an impact detector or a parking trigger. Identify the feature you need before comparing model names and marketing terms.

A car camera sensor can mean the image sensor that forms the video, the G-sensor that detects impact, or a separate radar or motion sensor used during parking. Those parts do different jobs, so a camera with more “sensors” is not automatically a better recorder.

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G-Sensor Dash CamDashcam Motion Sensor RecordingDash Cam Movement Sensors for Parked Cars

Common questions

Questions before you buy

What is a G-sensor in a car camera?

It is an accelerometer that can detect sudden movement and mark associated footage as an event. Sensitivity and file-protection behaviour vary by model.

Does a larger image sensor make a dash cam better at night?

It can help collect light, but sensor size alone does not determine the result. Lens aperture, processing, exposure and video compression also affect detail.

How does parking motion detection work?

Video-based systems look for changes in the image, while some cameras use radar to detect nearby movement. Both require compatible parking mode and power.

Why does a dash cam keep saving impact files?

The G-sensor may be too sensitive for the road surface or vehicle. Adjust it within the manufacturer's settings and regularly check storage rather than disabling protection blindly.