Dongar Dashcam Power Adapter (3-Pin Type A) - Hidden Plug & Play

In this review the Dongar Dashcam Power Adapter is examined for drivers who want a hidden, OEM-friendly way to power a USB dash cam without cutting wires. The adapter plugs into a 3-pin rearview mirror harness on supported Subarus and select Toyotas, giving a true plug-and-play installation that preserves mirror functions and keeps the dash cam wiring concealed behind the mirror. The single biggest reason to consider it is the no-permanent-modification fit that powers a USB dash cam when the ignition is on, avoiding battery drain while maintaining a tidy, factory appearance.

Key Features

• Plug-and-play installation: Plugs directly into the rearview mirror wiring to avoid cutting or splicing and keeps the dash cam wiring hidden behind the mirror.
• Preserves OEM mirror functions: Maintains auto-dimming and garage button features because it uses the mirror's powered connector rather than altering the mirror itself.
• Built-in USB power source: Provides 5V USB power for compatible dash cams and accessories so devices can be powered without bulky adapters.
• Wide dash cam compatibility: Works with many USB-powered dash cams such as Garmin Mini 2, Vantrue N2 Pro, Viofo and 70Mai, reducing compatibility checks for popular models.
• Accessory support: Also suitable for other USB accessories like radar detectors and GPS units that draw under the recommended current limit.

Who It's For

This adapter is best for vehicle owners who have a powered or auto-dimming rearview mirror with a 3-pin Type A connector and want a neat, reversible installation for a USB dash cam. Installers who prefer preserving their vehicle's original wiring and avoiding permanent modifications will value the hidden routing and preserved mirror features.

It is not intended for users who need constant parking-mode power or devices that require 12V, barrel jack power, or RJ11 connectors. Also check the mirror connector type and vehicle fit list before buying if your vehicle is not explicitly listed.

Pros & Cons

Pros

• Truly plug-and-play, so installation is fast and reversible without cutting OEM wiring.
• Keeps dash cam wiring hidden behind the mirror for a factory look.
• Includes three shorty USB cables (USB-C, Mini USB, Micro USB) for common dash cam connectors.
• Recommended for devices under 2A at 5V to ensure reliable thermal performance.

Cons

• Requires an auto-dimming or powered mirror and a compatible 3-pin connector, limiting fit to certain models.
• Not suitable for constant power or devices needing 12V or non-USB connectors.

Specifications

Brand	Dongar
Connector type	3-pin Type A rearview mirror harness
Output	Built-in USB power source (5V recommended)
Recommended draw	Less than 2A at 5V
Includes	One adapter and three short USB cables (USB-C, Mini USB, Micro USB)
Compatibility	2013+ Subaru BRZ, Toyota GR86 2013+, Subaru Crosstrek 2013-2017, select pre-2014 Subarus
Power behavior	Ignition-activated (turns on only when vehicle ignition is ON)

Our Verdict

The Dongar Dashcam Power Adapter is a practical, value-minded solution for drivers who want a clean, reversible way to power a USB dash cam from a powered rearview mirror. It is best for supported Subarus and similar vehicles with a 3-pin Type A mirror connector, and its plug-and-play approach preserves mirror features while hiding wiring. For anyone needing ignition-activated power without permanent wiring changes, this adapter delivers tidy installation and broad USB dash cam compatibility.

Frequently Asked Questions

Will this work for parking mode power?
No. The adapter is ignition-activated and is not intended to provide constant power for parking mode.

Which dash cams are compatible?
It supports USB-powered dash cams such as Garmin Mini 2, Vantrue models, Viofo and 70Mai, and other USB-powered devices that draw under 2A at 5V.

Does it require an auto-dimming mirror?
Yes. The adapter requires an auto-dimming or otherwise powered rearview mirror to function correctly.