G-Sensor in Dash Cams: How It Automatically Saves Crucial Footage in Accidents

When it comes to choosing the best dash cam for your car, most drivers look at video quality, storage, and parking mode. But there’s one feature that works silently in the background—and it might be the most important when an accident happens: the G-sensor.

Built into high-quality dash cams like the DRIVEYE D9, the G-sensor ensures that critical footage is never lost. It’s a core function that turns a regular car camera into a reliable eyewitness.

So what exactly does a G-sensor do? And why should it matter to anyone using a vehicle dash cam for accident recording?

A G-sensor, or gravity sensor, detects sudden shifts in motion—like abrupt braking, a sharp swerve, or a collision. As soon as it senses unusual movement, the dash cam immediately locks the current video file. This prevents it from being overwritten by regular loop recording. You don’t need to press any buttons, remember to save the file, or even realize something happened in the moment. Your dash cam takes care of it automatically.

For example, if someone rear-ends your car in traffic or scratches your bumper in a parking lot, the G-sensor kicks in. The DRIVEYE dash cam, which includes advanced G-sensor tuning, will detect the impact and secure the video. That footage is stored separately as an “event” file, which can be easily reviewed through the Viidure app or downloaded for insurance claims.

This feature is especially useful during hit-and-runs or when your car is parked and unattended. Combined with parking mode, the G-sensor ensures your car dash cam is always watching, even when you’re not behind the wheel.

Another benefit? The sensitivity is adjustable. You can set it to high if you often park on quiet streets or want every small bump recorded. Or keep it on medium or low for everyday driving, especially if you’re in areas with potholes or speed bumps. Most modern dash cams with G-sensor functionality let you customize this within the menu settings or mobile app.

For daily drivers, rideshare vehicles, and family cars alike, the G-sensor is a must-have. It acts like a second layer of insurance—one that automatically secures the most important seconds when something unexpected happens.

The DRIVEYE D9 dash cam, for instance, is built with not only a smart G-sensor but also 5-channel coverage, GPS tracking, and radar-assisted parking surveillance. That means it’s always ready—before, during, and after an incident.

If you’re investing in a car dash cam for accident protection, make sure the G-sensor is on your checklist. It may not be the flashiest feature, but when it matters most, it does the job you can’t do yourself: saving the truth.

Because when the moment is sudden, and the stakes are high, having a dash cam that locks down the evidence can make all the difference.

Drive confidently. Drive protected. With DRIVEYE.

Explore DRIVEYE D9