I read firsthand accounts from drivers who fitted these cams in their own cars. Their notes on straps, sight lines, and rear camera height helped shape this guide. As an Amazon Associate I earn from qualifying purchases. I may also earn a commission through the AUTO-VOX link at no extra cost to you.
Looking for dash cams that attach to rear view mirrors? Start with the WOLFBOX G840S. Its rubber straps hold the screen over your factory mirror, so the mirror stays on the glass. The AUTO-VOX V5 Pro takes more work. You remove the old mirror and fit the new one to a bracket.
Dash cams that attach to rear view mirrors at a glance
| Fit question | WOLFBOX G840S | AUTO-VOX V5 Pro |
|---|---|---|
| What holds it up? | Straps around your stock mirror | A replacement mirror bracket |
| Does the stock mirror stay? | Yes, behind the screen | No, you remove it |
| Does the rear lens need a wire? | Yes | Yes |
| What should you check first? | Room for the straps, lens, and visors | Bracket fit for your car and trim |
How the WOLFBOX G840S fits over your mirror
Picture your stock mirror as the base. The back of the G840S rests against its face. Two straps wrap behind the old mirror and hook onto the new unit. From your seat, you see the WOLFBOX screen.
The front lens sits on the left. It needs a clear view past the end of the stock mirror. The rear lens sits at the back of your car and sends its view through a cable. The straps solve one part of the job. You still need a path for that cable and a power lead for the screen.
The WOLFBOX G840S shows the shape of the unit. Compare its listed case size with the space between your visors. The 12-inch screen size is a diagonal measurement.
Will it fit your car?
- Try the visor swing. Cut a paper shape to the listed case width and height. With the car parked, hold it over your mirror. Lower each visor and swing it toward the side window.
- Feel behind the mirror. Check for room to pass both straps around the housing. A wide cover at the mirror stem can take up more space than you expect.
- Find the buttons you use. Look for garage door controls and switches along the lower edge. With the paper in place, can you still reach them?
- Look past the left edge. Check where the front lens will sit. If it faces the mirror shell or a sensor cover, part of your clip may show plastic instead of the road.
What owners learned after the install
A 2020 Silverado owner used the supplied straps on the stock mirror. They placed the rear lens high by the third brake light. That spot let them see the truck bed from the driver’s seat. If you haul gear, decide how much of the bed you want in the frame.
A Ford Bronco owner tried several rear lens spots with tape before choosing one. The plate sat low on the driver’s side. From there, the lens gave a poor overview of the road behind the Bronco. That trial spared the owner a permanent mount in the wrong spot.
You can try the same view check while parked. Put a bin at the back corner you care about. Compare the feed from two spots before you fix the lens in place. Then play a saved clip to see how much road and bumper made it into the frame. If reflections make the screen hard to read, try these tips for reducing mirror dash cam glare.
When the AUTO-VOX V5 Pro makes sense
The V5 Pro is worth a look if you want a single mirror housing. Its front lens sits in the new mirror, and the old mirror comes off. A Maverick Lariat owner made that swap and recorded both views. Their truck also needed two types of fuse tap [a plug for a fuse slot] for power.
Before you shop the V5 Pro at AUTO-VOX, take a photo of your mirror base. Send it with your car’s year, make, model, and trim. Ask which bracket fits and what happens to any controls built into your old mirror. If you plan to replace your mirror, compare the AUTO-VOX V5 Pro and T9 Pro to see where each front lens sits.
Make the call from your driver’s seat
When you shop for dash cams that attach to rear view mirrors, let the fit test decide. If the paper clears both visors and you can reach your buttons, the G840S is worth a closer look. If the fit is tight, put the tape measure away for a moment. Decide whether keeping your stock mirror matters more than having a screen there. That answer tells you whether to keep looking at strap-on cams or check the V5 Pro bracket.