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G-Sensor Dash Cam: What Impact Detection Really Does

A G-sensor detects changes in movement and can mark the associated recording as an event. It protects useful clips, but sensitivity and file-management behaviour matter.

A G-sensor dash cam measures acceleration and can classify footage around a sharp change as an event. In ordinary driving, the G-sensor on a dash cam may react to a collision, heavy braking or a severe bump. The recording is usually placed in a protected or event folder rather than treated like routine loop footage.

G-Sensor Dash Cam: What Impact Detection Really Does

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Common questions

Questions before you buy

What is a G-sensor on a dash cam?

It is an accelerometer that detects changes in movement. The camera can use that signal to mark or protect an event recording.

Does a G-sensor record all the time?

The camera normally handles continuous loop recording; the G-sensor identifies sudden movement so the relevant clip can be treated differently.

Why does my dash cam keep creating event files?

Sensitivity may be too high for local roads or the camera mount may be moving. Check mounting security and adjust sensitivity according to the manual.

Will a G-sensor work while the car is parked?

It can on supported models, but parked recording requires the correct power arrangement and parking mode to be enabled.

Can protected dash cam files still be overwritten?

File rules vary, and protected storage can eventually fill or recycle. Copy important footage promptly and follow the manufacturer's storage guidance.