Digital Side Mirrors: Legal Car Mirror Replacements?

Updated 6 November 2026 · Standard formula, shown below

Yes, digital side mirrors can legally replace traditional glass mirrors in many countries, but the legality depends on specific regulations that vary by region and vehicle type. In the US, for example, federal standards currently require all passenger cars to have both a left and right outside mirror, and while digital camera-based systems are not explicitly prohibited, they must meet the same field-of-view and durability requirements as conventional mirrors. This article explains the legal landscape, how these systems work, their pros and cons, and what to consider if you’re thinking about making the switch.

Background: The Shift from Glass to Cameras

Traditional side mirrors have been a standard feature on cars for nearly a century, but they come with drawbacks: they create aerodynamic drag, increase wind noise, and leave blind spots. Automakers have long explored replacing them with cameras and screens, which can be smaller, more aerodynamic, and potentially safer by eliminating blind spots. The first production car with digital side mirrors was the 2018 Audi e-tron, followed by the Honda e and the Lexus ES in certain markets. These systems use exterior cameras that feed live video to displays mounted inside the car on the door panels or the dashboard.

The regulatory environment has been slow to catch up. In 2016, the United Nations Economic Commission for Europe (UNECE) adopted Regulation No. 46, which allows camera-monitor systems to replace mirrors in countries that follow UNECE standards, including most of Europe, Japan, and South Korea. The US, however, has its own Federal Motor Vehicle Safety Standards (FMVSS) that have not yet been updated to explicitly permit camera-only systems, though some automakers have petitioned for changes.

How Digital Side Mirrors Work

Digital side mirrors consist of three main components: a camera mounted on the exterior of the car (typically in place of the mirror), a display screen inside the cabin, and software that processes the video feed. The cameras are usually positioned on the doors or the front fenders, and they capture a wide-angle view of the area alongside and behind the vehicle. The displays are often located at the base of the A-pillars or on the doors, where they are easy to see without taking your eyes far off the road.

Key features of most systems include:

Blind spot elimination: The camera’s wide-angle lens can cover a larger area than a conventional mirror, often including the blind spot.
Zoom and dynamic overlays: When you activate a turn signal, the system may automatically zoom in or adjust the view to show the area you’re about to merge into.
Low-light enhancement: Cameras can amplify light in dark conditions, making it easier to see at night.
Reduced wind noise and drag: Because the camera housings are smaller and more aerodynamic than traditional mirrors, they can improve fuel efficiency and reduce cabin noise.

Legal Status Around the World

The legality of digital side mirrors is not uniform. Here’s a breakdown of the current situation in major markets:

Europe (EU/UNECE countries): Legal since 2016 under UNECE Regulation No. 46, which sets technical requirements for camera-monitor systems. Many European automakers offer digital mirrors as options on production models.
Japan: Legal since 2016, and several models, including the Honda e and the Nissan Skyline, offer digital mirror options.
United States: Not explicitly legal for passenger cars because FMVSS 111 requires rear visibility mirrors that meet specific field-of-view standards. However, the National Highway Traffic Safety Administration (NHTSA) has granted exemptions for some vehicles, and there is ongoing discussion about updating the standard. Currently, no production passenger car in the US offers digital side mirrors as a replacement for glass mirrors, though some commercial vehicles have been allowed to use camera systems.
China: Legal since 2022, with several domestic models offering the technology.

It’s important to check your local regulations before attempting to retrofit a digital mirror system, as aftermarket installations may not be street-legal even if the technology is approved for factory installation.

Pros and Cons of Digital Side Mirrors

Digital side mirrors offer several advantages over traditional mirrors, but they also come with trade-offs.

Advantages

Improved aerodynamics: Smaller camera housings reduce drag, which can improve fuel economy and reduce wind noise.
Better visibility: Wide-angle cameras can eliminate blind spots, and the image can be enhanced in low light.
Customizable views: Some systems let you adjust the camera angle or zoom, and they can automatically switch to a rear-view or trailer view when needed.
Safety features: Many systems integrate with lane departure warnings and blind spot monitoring, providing visual alerts on the display.

Disadvantages

Cost: Digital mirror systems are significantly more expensive to repair or replace than conventional mirrors. A single camera or display can cost several hundred dollars, and the entire system may be more complex.
Reliability: Cameras and screens can fail, especially in extreme weather. If the system malfunctions, you may be left without a side view, which could be dangerous.
Dirt and debris: Cameras can get covered in mud, snow, or rain, obscuring the view. Some systems have built-in washers or heaters, but these add complexity.
Lag and distortion: Some users report a slight delay in the video feed, which can be disorienting at high speeds. Also, the wide-angle lens can distort distances, making it harder to judge how close other vehicles are.
Adaptation period: Drivers need time to get used to looking at screens instead of mirrors, and the placement of the displays may not suit everyone.

Costs and Retrofitting Considerations

If you’re considering adding digital side mirrors to a car that didn’t come with them, be prepared for a significant investment. Factory-installed systems are typically part of a technology package that can add $1,000 to $3,000 or more to the vehicle’s price. Retrofitting an aftermarket system is possible but challenging because it requires integrating cameras, displays, and wiring with the car’s electrical system. You may also need to modify the doors and interior panels, and the system must be calibrated to meet legal requirements.

Before retrofitting, consider:

Compatibility: Not all cars have the necessary mounting points or electrical capacity.
Warranty: Aftermarket modifications can void your vehicle warranty.
Insurance: Some insurers may not cover aftermarket modifications, or they may increase your premium.
Legal compliance: The system must meet the same visibility standards as traditional mirrors, which may be difficult to verify for aftermarket products.

Safety and Practical Concerns

Safety is the biggest concern with digital side mirrors. Proponents argue that they improve safety by eliminating blind spots and enhancing visibility in poor conditions. However, there are also potential drawbacks:

Failure modes: If a camera gets dirty or a screen freezes, you lose that view entirely. Traditional mirrors are mechanical and rarely fail completely.
Driver distraction: Looking at a screen can be more distracting than glancing at a mirror, especially if the display is not positioned optimally.
Depth perception: The flat image on a screen does not provide the same depth cues as a mirror, making it harder to judge distances.
Weather performance: Cameras can be obscured by rain, snow, or mud, and while some systems have heaters and washers, they may not be as effective as a simple wipe of a mirror.

That said, digital mirrors have been shown to reduce blind spots significantly, and many drivers who use them report feeling safer. The technology is still evolving, and as it improves, it may become more widely accepted.

Comparisons: Digital vs. Traditional Mirrors

To help you decide, here’s a quick comparison:

Cost: Traditional mirrors are cheaper to replace, often under $200 for a basic unit. Digital mirrors can cost $500 to $1,500 per side.
Durability: Traditional mirrors are simple and robust; digital cameras are more vulnerable to damage and electronic failure.
Visibility: Digital mirrors offer a wider field of view and better low-light performance, but can suffer from glare or screen reflections.
Aerodynamics: Digital mirrors are more aerodynamic, which can improve fuel economy by 1-2% at highway speeds.
User experience: Traditional mirrors are familiar and reliable; digital mirrors require an adjustment period but offer advanced features like auto-zoom and blind spot alerts.

Frequently Asked Questions

Are digital side mirrors legal in the US?

As of now, digital side mirrors are not explicitly legal for passenger cars in the US because federal standards require outside mirrors that meet specific field-of-view requirements. However, NHTSA has granted exemptions for some vehicles, and the agency is considering updates to the standards. It’s best to check current regulations before making any changes.

Can I replace my car’s mirrors with cameras?

In most countries, you cannot simply replace your mirrors with aftermarket cameras unless the system is certified to meet local regulations. Even in places where digital mirrors are legal, they must be installed by a professional and meet specific technical requirements. Retrofitting a camera system to a car not designed for it is complex and may not be street-legal.

Do digital mirrors have blind spots?

Digital mirrors can eliminate the traditional blind spot by using wide-angle cameras, but they may introduce new blind spots if the camera is not positioned correctly or if the display is too small. Some systems have multiple cameras or dynamic overlays to minimize this issue.

What happens if a digital mirror fails while driving?

If a camera or display fails, you lose that side view, which can be dangerous. Most systems have a warning indicator, but they do not have a backup mirror. It’s important to regularly check that the cameras are clean and functioning, and to pull over if you notice a problem.

Are digital mirrors better than traditional mirrors?

It depends on your priorities. Digital mirrors offer better aerodynamics, potentially fewer blind spots, and enhanced low-light visibility, but they are more expensive and can be less reliable. Traditional mirrors are simpler, cheaper, and more familiar. Many drivers find that after an adjustment period, they prefer the enhanced view of digital mirrors.

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