What rear view mirror accessories do

Rear view mirror accessories attach to or replace your existing mirror to extend what you can see, reduce blind spots, or add features like heating or integrated displays. The most common types are convex mirror attachments that widen your field of view, blind spot mirrors that mount on the sides, heated mirror elements for defrosting, and dash cam or display mounts that clip to the mirror itself. Some vehicles come with these built in; others require you to buy and install them separately.

The choice depends on what problem you're trying to solve. If you drive a truck or van with large blind spots, a convex mirror or blind spot mirror solves that. If you live in a cold climate, a heated mirror element prevents ice buildup. If you want to record video or display a backup camera feed, a mirror-mounted bracket or replacement mirror with a built-in screen handles that.

Key Takeaways

  • Convex mirror attachments and blind spot mirrors reduce blind spots but show a smaller, distorted image that takes practice to read accurately.
  • Heated mirror elements require a wired connection to your vehicle's electrical system and work best when installed during a professional service.
  • Dash cam and display mounts attach to your existing mirror and hold phones, tablets, or aftermarket cameras without permanent modification.
  • Installation ranges from adhesive strips (five minutes, no tools) to hardwired connections (one to two hours, requires basic electrical knowledge or a technician).
  • Mirror accessories vary widely in price and durability; cheap adhesive mirrors often fail in heat or vibration, while quality options last the life of the vehicle.

Convex and blind spot mirrors: expanding what you see

A convex mirror attachment is a curved, wide-angle mirror that clips or adheres to your existing side mirror or rear view mirror. It shows a larger area than a flat mirror but makes objects appear smaller and farther away than they actually are. This trade-off means you gain coverage but lose some depth perception, so you need to account for that when changing lanes or backing up.

Convex mirrors work best on the sides of your vehicle (mounted on the driver's and passenger's side mirrors) to catch the blind spots that your main mirrors miss. They're especially useful on trucks, vans, and SUVs where the blind spots are large. Most convex attachments cost between $15 and $50 per mirror and stick on with industrial-strength adhesive or a bracket.

Blind spot mirrors are smaller, more specialized convex mirrors designed specifically to sit in the upper corner of your side mirror. They're less noticeable than a full convex attachment and give you a quick glance at the blind spot without having to turn your head. Installation is the same—adhesive or bracket—and they typically cost $10 to $30.

Both types require a few days for adhesive to cure fully before you drive, and both can loosen or fall off if exposed to extreme heat or if the mirror surface is dirty when you install them. Clean your mirror with rubbing alcohol and let it dry completely before attaching.

Heated mirror elements: preventing ice and fog

A heated mirror element is a thin resistive wire embedded in the mirror glass that warms up when you turn it on, melting ice and clearing condensation. Most vehicles with this feature have a button on the door panel or steering wheel that activates heating for both side mirrors and the rear window at the same time. If your vehicle doesn't have this feature and you want to add it, you have two options: buy a replacement mirror assembly with heating built in, or add an aftermarket heating pad.

Replacement mirror assemblies with heating cost $150 to $400 per mirror depending on your vehicle model and whether the mirror has power adjustment, power folding, or integrated turn signals. Installation usually requires removing the door panel and disconnecting the old mirror, then plugging in the new one—a job that takes one to two hours and is best done by a technician if your vehicle has complex wiring.

Aftermarket heating pads are cheaper ($30 to $80) but more difficult to install because they require you to run wires through your door and connect them to a power source. Most people use a relay connected to the rear window defrost circuit, which means running wire through the door jamb and into the cabin. This is a job for someone comfortable with basic automotive electrical work or a shop that does custom installations.

Heated mirrors draw significant current (10 to 15 amps), so they should only run for a few minutes at a time. Most vehicles with factory heating have an automatic shutoff after 10 to 20 minutes to avoid draining the battery.

Dash cam and display mounts: adding screens and cameras

A mirror-mounted bracket or clip lets you attach a phone, tablet, or aftermarket camera to your rear view mirror without drilling holes or running permanent wiring. These mounts range from straightforward plastic clips ($10 to $25) to adjustable arms with suction cups or adhesive bases ($25 to $60). They're useful for holding a dash cam, backup camera display, GPS device, or phone for navigation.

The advantage of a mirror mount is that it keeps your device in your line of sight and doesn't clutter your dashboard. The disadvantage is that it can obstruct your view slightly, especially if you mount a large screen or camera. Most people mount smaller devices (phones or compact cameras) and position them to the side of the mirror rather than directly behind it.

If you want a replacement mirror with an integrated display, aftermarket options exist that combine a rear view mirror with a built-in screen for a backup camera feed or dash cam video. These cost $150 to $400 and require professional installation because they need to be wired to your backup camera or dash cam and sometimes to your vehicle's power system. The screen quality and brightness vary widely, so read reviews before buying.

Mirror-mounted brackets are the easiest to install—most use adhesive or suction cups and take five minutes. Replacement mirrors with displays require removing the old mirror and running wiring, which typically takes one to two hours.

Installation methods: adhesive, brackets, and hardwiring

Most mirror accessories use one of three installation methods. Adhesive is the simplest: clean the mirror surface with rubbing alcohol, let it dry, peel the backing off the adhesive strip, and press the accessory firmly for 30 seconds. Wait 24 to 48 hours before driving to let the adhesive cure. This works for convex mirrors, blind spot mirrors, and straightforward clips.

Bracket mounting uses a clamp or strap that wraps around your existing mirror stem or attaches to the mirror frame. This takes 10 to 15 minutes and requires no tools on most models. Brackets are more find than adhesive in hot climates and can be removed without damaging the mirror.

Hardwiring is necessary for heated mirrors and some integrated displays. This means running wires from the accessory through your door and into the cabin, then connecting them to a power source (usually the battery or an existing circuit like the rear window defrost). Hardwiring requires basic electrical knowledge: you need to identify the correct wires, use a relay if the accessory draws significant current, and find the wiring so it doesn't rattle or get pinched. Most people have this done by a technician, which costs $100 to $300 in labor depending on complexity.

Choosing between quality levels and price ranges

Mirror accessories range from $10 budget options to $400+ premium replacements. The difference is durability, optical quality, and features. A $15 adhesive convex mirror from a discount retailer may fall off within a year in a hot climate or after repeated vibration. A $40 convex mirror from an automotive supplier with a stronger adhesive formula and better optical glass will likely last five years or longer.

For heated mirrors, a $150 replacement assembly from an aftermarket supplier is usually reliable but may not match your vehicle's original styling or have all the features of a factory mirror (like integrated turn signals). A $300+ OEM replacement mirror will match exactly and include all factory features, but costs more and may only be available through a dealership.

For dash cam mounts and clips, the difference is mainly in build quality and adjustability. A $15 plastic clip works fine for a lightweight phone but may sag or rotate under vibration. A $50 adjustable arm with a ball joint and rubberized grips holds heavier devices steady and lets you position them precisely.

If you plan to keep your vehicle for several years and use the accessory regularly, spending more upfront usually saves money on replacements. If you're testing whether you need the accessory or plan to remove it later, a budget option is reasonable.

Common problems and how to avoid them

Adhesive mirrors fail most often because the mirror surface wasn't clean or dry when installed, or because the adhesive wasn't strong enough for the climate. Always use rubbing alcohol to clean, wait for it to dry completely, and choose an adhesive formula rated for automotive use and outdoor temperatures. If you live in a very hot climate, consider a bracket mount instead.

Heated mirror elements sometimes stop working because the wiring came loose, the relay failed, or the heating element itself burned out. If a heated mirror stops working, check that the button activates the rear window defrost (they usually share a circuit). If the rear window works but the mirrors don't, the problem is likely in the mirror wiring or the relay, which a technician can diagnose in 15 minutes.

Dash cam mounts fall off or rotate because the adhesive or suction cup wasn't applied correctly, or because the device is too heavy for the mount. Use a mount rated for the weight of your device, and if using adhesive, follow the cure time before driving. Suction cup mounts work best on smooth, clean glass and fail on textured or dirty surfaces.

Replacement mirrors with integrated displays sometimes have poor video quality or brightness issues. Before buying, check the resolution (720p minimum, 1080p preferred), brightness rating (at least 500 nits for daytime visibility), and whether the screen has an anti-glare coating. Read reviews that mention real-world use in daylight, not just lab conditions.

Frequently Asked Questions

Do I need a convex mirror if my vehicle has a backup camera?

A backup camera shows what's directly behind you, but it doesn't help with side blind spots when you're driving forward or changing lanes. A convex mirror on your side mirrors covers the blind spot that your main mirrors miss. Many drivers use both: the backup camera for parking and the convex mirrors for lane changes.

Can I install a heated mirror element myself?

If you're comfortable running wires through a door and connecting a relay to your vehicle's electrical system, yes. If not, have a technician do it—the cost is $100 to $300 in labor, and mistakes can damage your vehicle's wiring or drain the battery. A replacement mirror assembly with heating built in is easier to install if your vehicle supports it.

Will a mirror-mounted dash cam obstruct my view?

It depends on the size of the camera and where you mount it. A small camera mounted to the side of the mirror has minimal impact. A large screen or camera mounted directly behind the mirror will block some of your view. Test the position before permanently adhering it, and consider a dashboard mount instead if obstruction is a concern.

How long does adhesive take to cure on a mirror accessory?

Most automotive-grade adhesive takes 24 to 48 hours to reach full strength. Some products claim faster cure times (as little as 4 hours), but waiting the full time reduces the risk of the accessory shifting or falling off during the first few days of driving and vibration.

What's the difference between a convex mirror and a blind spot mirror?

A convex mirror is larger and shows a wider field of view, making it useful for trucks and vans with large blind spots. A blind spot mirror is smaller and designed to fit in the corner of your side mirror, giving you a quick glance at the blind spot without taking up much space. Both use the same curved-glass principle but serve slightly different needs.