Can we keep the rearview mirror DVR on a dashboard?

This is not an answer, you sure can no issues on that but it will better view when at its destined place. In most cases ,it’s not recommended to place a rearview mirror DVR on the dashboard—and here’s why, along with key considerations:

1. Core Issue: Defeats the "Rearview Mirror" Function

A rearview mirror DVR is designed to replace or mount onto your vehicle’s original rearview mirror (either by clamping onto it or replacing it entirely). Placing it on the dashboard breaks its core purpose: it can no longer align with your line of sight for rearward viewing, making it useless for checking traffic behind you—one of the DVR’s key dual roles (recording + rearview).

2. Safety Risks

Blocked Vision: Dashboard placement may obscure your view of the road ahead (especially if the DVR is large), violating safety regulations in many regions.

Unstable Mounting: Dashboards are often sloped or smooth; the DVR may slide, vibrate heavily during driving, or even fall off (risking distraction or damage) unless secured with strong adhesives.

3. Poor Recording Angle:

Dashboard positioning typically limits the DVR’s field of view—either cutting off the upper part of the road (e.g., traffic lights) or capturing too much of the dashboard itself, instead of the optimal "road-centric" angle. On the dashboard, the screen may face upward, making it hard to see while driving, especially in sunlight.

Rear camera misalignment: The backup camera feed may not align properly if the DVR is not mounted where a rearview mirror would be .

4. Exception: If It’s a "Dual-Purpose" Model

Some devices labeled "rearview mirror DVR" also include a detachable dashboard mount (rare, but possible). If your model explicitly comes with a dashboard-compatible base (and the manufacturer confirms it’s safe), ensure:

The mount is fixed firmly (e.g., suction cup + adhesive pad).

The DVR doesn’t block the driver’s line of sight or airbags.

The recording angle still covers the road effectively.

Looking for rear view mirror DVR that excels at the intended "on-mirror" installation mercylion M9661 interior mirror dash cam is a reliable choice for proper mounting.

Final Note

For safety, functionality, and compliance, , use it as intended—mounted on or replacing the rearview mirror—this is its intended and safest position.