iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Digital side mirrors replace exterior mirror glass with cameras and in-cabin displays, but they are not yet a universal replacement. In the United States, conventional exterior mirrors remain the baseline in the federal rules covered by the available sources; whether a camera system can replace them depends on the jurisdiction and the vehicle’s approval. Digital mirrors can change packaging and visibility, but they also introduce new questions about image size, driver glance behavior, weather, and system failure.
What digital side mirrors are—and what they are not
A camera-monitor system (CMS) uses cameras mounted outside the vehicle to capture prescribed side or rear views and sends those images to displays inside the cabin. Screens may sit near the A-pillars, dashboard, or another location; unlike a conventional mirror, the camera and display do not have to share a direct optical line of sight. The system’s field of view, image quality, display position, and other performance requirements are matters of vehicle approval and applicable standards.
A mirror-replacement CMS is different from a backup camera, an interior rearview display, or a supplemental blind-spot camera. For example, NHTSA described Honda LaneWatch as a passenger-side camera whose image appeared on the center display when activated. That feature supplements the exterior mirror; it does not replace the required mirror. NHTSA’s 2019 Federal Register notice discusses that distinction.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Why automakers are exploring camera-monitor systems
Smaller exterior hardware
A compact camera housing can take up less space outside the vehicle than a conventional mirror assembly. Manufacturers have presented reduced aerodynamic drag and improved efficiency as potential design benefits. Those are design rationales, not proof that every CMS-equipped vehicle gets a measurable fuel-economy or range improvement. A vehicle-specific official test would be needed to support a number.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Flexible view and display placement
Engineers can choose a camera view and place its display where it fits the cabin design. A wider field of view may show more surrounding area, but if it is squeezed onto a display about the size of a mirror, vehicles and other objects can appear smaller. Screen placement also changes where the driver looks, so a familiar mirror glance may take adjustment.
Image processing and changing light
Electronic processing and display brightness can be designed to help make an image usable in different lighting. In NHTSA’s assessment of one prototype, the displayed areas appeared brighter at dawn and dusk, and the researchers observed minimal sunlight glare. Those observations apply to that prototype and test; they do not establish how every production system performs in every condition.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
What the evidence says about visibility and trade-offs
NHTSA evaluated a prototype CMS installed on a 2016 Audi A4 and compared it with production mirrors on a 2017 Audi A4. The report found the prototype’s image clarity comparable to exterior mirrors and its field of view above the applicable FMVSS No. 111 requirements. NHTSA’s report states: “The prototype CMS exceeded the rear visibility field of view requirements of FMVSS No. 111, as is the case with most installed outside rearview mirrors on vehicles sold in the United States.” The 2018 prototype report also found that a wider view on a display with an area similar to a mirror made objects look narrower and harder to discern.
This was a prototype assessment, not a fleet-wide safety study. It does not show that camera mirrors reduce crashes or outperform conventional mirrors across vehicles. The report also did not assess component durability and reliability. It identifies field of view, image quality, display location, driver acclimation, reliability, and test methods as questions that matter; rain, darkness, and lens obstruction also require evaluation.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Are digital side mirrors legal in the US?
For a system that replaces the required exterior mirrors, do not assume it is permitted simply because a vehicle has cameras or displays. NHTSA’s 2019 advance notice described Federal Motor Vehicle Safety Standard (FMVSS) No. 111 as requiring rearview mirrors on new vehicles and asked for comment on whether CMS could be allowed as an alternative. An advance notice is not a final rule granting that permission. The notice is the relevant historical regulatory document.
In a July 2026 keynote, NHTSA said it planned to amend FMVSS No. 111 requirements for mirrors and rearview displays in its automated-vehicle work. That statement describes agency plans; it does not itself change the rule or establish general permission for human-driven vehicles to replace required side mirrors with CMS. NHTSA’s SAE ATS keynote should not be read as a final regulatory action. Check current federal requirements and the vehicle’s approval for the specific market before treating a replacement system as legal.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
International approval is not a blanket global authorization either. ISO 16505:2019 sets minimum safety, ergonomic, and performance requirements for CMS replacing mandatory mirrors within its scope. The ISO page notes a 2021 amendment and says the standard is under revision. NHTSA’s 2019 notice also describes UNECE Regulation No. 46 as amended to permit CMS in applicable jurisdictions. The applicable national rules and vehicle approval still determine whether a particular system may replace mirrors.
Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallHow camera mirrors compare with conventional mirrors
| Consideration | Conventional exterior mirror | Mirror-replacement CMS |
|---|---|---|
| How the view is produced | Direct optical reflection from exterior mirror glass. | Exterior camera captures a view and sends an electronic image to a cabin display. |
| Field of view | Depends on mirror geometry and adjustment; the U.S. regulatory baseline is specified in FMVSS No. 111. | Depends on camera, processing, display, and applicable approval requirements. NHTSA’s prototype exceeded the applicable field-of-view requirements, but that result is not a finding about every CMS. |
| Image scale and detail | Objects are viewed in the mirror’s reflected image. | A wide view on a similarly sized screen can make objects look smaller and harder to distinguish, as in NHTSA’s tested prototype. |
| Driver glance | Driver looks toward the exterior mirror’s location. | Driver looks toward the screen location, which may differ and require acclimation. |
| Weather and obstruction | Mirror glass can be affected by water, dirt, or frost. | Camera lens contamination, darkness, rain, and other conditions can affect the view; performance depends on the specific system. |
| Failure modes | Mirror glass or housing can be damaged or displaced. | Camera, display, connection, or power failure can interrupt the electronic view. The cited prototype assessment did not test component durability or reliability. |
What happens in rain, darkness, or if a camera fails?
There is no single answer for every vehicle. Water or dirt on a camera lens can obscure its image, while darkness and glare challenge camera and display performance. Image processing may help in some circumstances, but the available prototype findings do not establish that all systems maintain a clear view in rain, darkness, or when a lens is dirty.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
A camera, display, wiring connection, or power fault could interrupt the view. The NHTSA prototype report did not test durability or reliability, so it cannot establish a universal failure rate or a standard fallback behavior. Before relying on a replacement CMS, consult the vehicle manual for warnings, fault indications, and the manufacturer’s stated response to a system problem. Do not assume a backup view is present unless the vehicle documentation says so.
Do digital mirrors improve fuel economy or electric-vehicle range?
Smaller external housings may reduce drag, which is why manufacturers have explored CMS as an aerodynamic design choice. The evidence described here does not provide a general fuel-economy or range gain, and NHTSA’s prototype study assessed visibility rather than fleet-wide efficiency. Any claimed benefit should be tied to a specific vehicle’s official data and test conditions, not generalized to camera mirrors as a category.
Which vehicles offer replacement camera mirrors?
Availability depends on model, market, and local vehicle approval; a camera feature on a vehicle does not necessarily replace its side mirrors. The examples in NHTSA’s 2019 notice—including a Japan-only Lexus ES CMS version, a limited European Volkswagen XL1 run, and an expected European Audi e-tron option—are historical, not a current buying list. Confirm current manufacturer specifications and local approval for the exact model year and country before assuming a system is available or legally approved as a replacement.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
How to assess a digital mirror system before driving
- Confirm what it replaces. Check the manufacturer’s specifications to see whether the cameras replace exterior mirrors or supplement them.
- Check market approval. Verify that the exact vehicle and system are approved for use in your country, rather than relying on a feature description or an approval from another market.
- Inspect the display view. From the normal driving position, check whether the image is easy to locate and whether distant vehicles or objects are discernible in the wider view.
- Learn the system’s warnings and recovery guidance. Read the owner’s manual for camera obstruction messages, display or power faults, and the manufacturer’s instructions if the image disappears.
- Try the view in relevant conditions. If possible, assess it in daylight and darkness and learn how the system indicates a dirty or obstructed lens. Do not treat one successful test as proof of performance in every weather condition.
What remains uncertain
The available primary-source material does not establish a representative crash-outcome statistic or a current market adoption rate for mirror-replacement CMS. NHTSA’s cited work is a prototype evaluation, not a population study, so it cannot show whether the technology reduces crashes at fleet scale. Nor does the prototype’s performance establish that all production systems share its visibility results, reliability, or behavior in poor conditions.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
