Rexing RD 4 Review: The 4-Channel Dash Cam That Covers Every Side

You park in a lot where the side mirrors get clipped more than the front bumper. A standard front-and-rear dash cam leaves you guessing about what happened on the driver's side or the passenger's side. The Rexing RD 4 exists to close that gap. It records all four sides of your vehicle in 1080p, so when a fender-bender happens at an intersection, you have footage of the car that cut you off, not just the one behind you.

This is a specific tool for a specific job: total perimeter coverage. If you drive a truck, an SUV, or a car that spends a lot of time in tight urban parking, the RD 4 is the model to look at. It integrates a 360° motion parking monitor, so it keeps watching even after you kill the engine. For drivers who want to know exactly what happened on every side of their vehicle, this is the Rexing RD 4 that handles the heavy lifting.

Quick Answer

What actually changes the buy is fit, what you should skip, and which tradeoffs show up after week one — not a longer spec sheet. If you already know the job, see current options while you read the criteria.

What the Official Page Actually Lists

The Rexing RD 4 is positioned as an "all-around" solution. Here are the key specifications and features listed on the official product page:

The system uses a built-in motion sensor for parking mode, meaning you do not need to buy a separate hardwire kit or motion sensor accessory to get 24/7 protection. The GPS data is stored with the video files, allowing you to verify speed and location later. If you are considering the Rexing RD 4, these are the core specs that define its capability.

What reviewers say

Reviews from YouTube say this about the Rexing RD 4.

On YouTube, a reviewer titled their video "RexingUSA R4 Dash Cam Review: Ultimate 4 Channel Car Camera!" The title itself suggests that the 4-channel configuration is the standout feature for viewers who want comprehensive coverage. ↗ Check the official listing before you buy.

Another YouTube video, titled "RexingUSA R4 4-Channel 1080p WiFi GPS Dash Cam - HONEST Review," focuses on the specific combination of 1080p resolution, Wi-Fi, and GPS in a 4-channel package. This indicates that buyers are specifically looking for a system that balances high-resolution video on all sides with modern connectivity features like Wi-Fi transfer and GPS logging. ↗ Check the official listing before you buy.

Who it's for

The Rexing RD 4 is designed for drivers who feel that a standard front-and-rear setup leaves them vulnerable. If you drive in dense city traffic, park in tight spots, or drive a large vehicle like a truck or SUV where blind spots are significant, this system is built for you.

• Urban Commuters: You deal with tight lane changes and parking lots where side collisions are common. The left and right cameras capture the vehicles that standard cams miss.
• Fleet and Ride-Share Drivers: You need to document incidents from all angles to support claims. The 4-channel setup provides a complete picture of the event.
• Safety-Conscious Parents: The ability to rotate the side cameras inward allows you to monitor the cabin when needed, adding a layer of awareness for passengers.
• Parking Lot Regulars: The built-in 360° motion monitor ensures that if someone hits your parked car, you have footage of the impact from the side it came from. See options

If you want a system that covers the entire perimeter of your vehicle, the Rexing RD 4 is the model that fits that need.

Who should skip

This is not a one-size-fits-all solution. The Rexing RD 4 has specific requirements and limitations that may not suit every driver.

• Front-Only Focus Users: If you only care about what happens in front of your car, a 4-channel system is overkill. A single-lens dash cam is simpler and cheaper.
• Minimalist Installers: This system requires four cameras. If you want a discreet, single-unit setup with minimal wiring, the RD 4 will be more complex to install and manage.
• 4K Enthusiasts: The RD 4 records at 1080p on all channels. If you require 4K resolution for the front view, you should look at other models in the Rexing lineup, such as the Rexing F30 4K+1080p Dual Dash Cam, which prioritizes front resolution.
• Battery Concerns: Parking mode requires a power source. As noted in reviews of other Rexing models, parking mode can drain the battery if not connected to a hardwire kit or a constantly powered source. Verify your vehicle's electrical setup before relying on 24/7 parking monitoring.

If you prefer simplicity or only need front-facing footage, consider a different model. You can compare options by checking current Rexing dash cam models.

Mid-check

If the criteria above already match how you actually use the space, stop here and check current options before you keep reading comparison noise. Confirm details on the current product page.

See brand options

How to choose in five minutes

If you are deciding whether the Rexing RD 4 is the right fit, ask yourself these five questions:

1. Do I need side coverage? If yes, the RD 4 is one of the few models that offers dedicated left and right cameras in a single system. See options
2. Do I want built-in parking monitoring? The RD 4 has a built-in 360° motion monitor. If you need to buy a separate hardwire kit for parking mode, look at other models. See options
3. Is 1080p enough for me? If you need 4K for the front view, the RD 4 is not the right choice. If 1080p is sufficient for all four sides, it is a strong option. See options
4. Am I comfortable with a 4-camera install? If you want a single unit, skip this. If you are willing to install four cameras for total coverage, proceed. See options
5. Do I use GPS data? If you want to log speed and location with your video, the RD 4 includes GPS. If you do not care about GPS, it is a bonus feature. See options

If you answered "yes" to most of these, the Rexing RD 4 is a logical choice. For more details on what to look for in a dash cam, see our guide to dash cam features.

FAQ

Is the Rexing RD 4 a 4K dash cam? No, the Rexing RD 4 records at 1080p on all four channels. If you need 4K resolution, you should look at other models in the Rexing lineup.

Does the Rexing RD 4 require a hardwire kit for parking mode? The official page lists a "Built-in 360° Motion Parking Monitor," which suggests that the motion sensor is integrated. However, parking mode still requires a power source. You may need a hardwire kit to connect to your vehicle's fuse box for constant power. Verify the specific power requirements on the product page.

Can I view the GPS data on the dash cam? Yes, the Rexing RD 4 includes GPS that logs route, speed, and location. You can view this data using the GPS Player software.

Are the side cameras fixed? No, the side cameras can be rotated inward for cabin monitoring or outward for road coverage. This flexibility allows you to adjust the system based on your needs. Check the official listing before you buy.

Is the Rexing RD 4 suitable for trucks? Yes, the 4-channel setup is particularly useful for trucks and SUVs where blind spots are larger. The 170° front field of view and side cameras provide comprehensive coverage for larger vehicles.

If the FAQ answered your main objections and you want current models or trial terms, see brand options.

Bottom line

The Rexing RD 4 is a specialized tool for drivers who need total perimeter coverage. It is not the simplest dash cam to install, and it is not the highest-resolution model on the market. But if you want to know what happened on every side of your vehicle, it is one of the few options that delivers. The built-in 360° motion monitor and GPS logging add value for drivers who want a complete security system.

If you are ready to upgrade your coverage, see current options for the Rexing RD 4.

Sources

1. YouTube — https://www.youtube.com/watch?v=2Np0w6UDl8o
2. YouTube — https://www.youtube.com/watch?v=38-uHCkctII

Related Links

• Guide to Dash Cam Features
• How to Choose a Dash Cam for Trucks