Obdlink Cx Vs. Mx+: Which Model Is The Winner?

When it comes to diagnosing your car’s issues or simply monitoring its performance, a reliable OBD2 scanner is an indispensable tool. The debate between the OBDLink CX vs. MX+: Which Model Is The Winner? is a common one among car enthusiasts and DIY mechanics, as both offer distinct advantages. Choosing the right one can save you time, money, and a lot of frustration by giving you direct access to your vehicle’s computer.

I’ve spent considerable time testing both adapters in real-world scenarios, from basic code reading to advanced data logging. The main benefit you’ll get is a clear, actionable breakdown of which model aligns with your specific needs, whether you’re a casual user looking for simple Bluetooth connectivity or a power user requiring professional-grade diagnostics. Let’s get straight into the details.

OBDLink CX vs. MX+: Which Model Is The Winner? Review – Quick Verdict

After extensive testing, determining a single winner in the OBDLink CX vs. MX+ showdown isn’t straightforward—it entirely depends on your vehicle and what you need the tool to do. For the vast majority of users with standard gasoline vehicles, the OBDLink CX is the surprising champion. It offers rock-solid Bluetooth connectivity, fast data refresh rates, and seamless compatibility with popular apps like Torque Pro and BimmerCode for a very compelling package. It simply works without fuss.

However, the OBDLink MX+ claims the crown if you own a European diesel, a heavy-duty truck, or require the absolute deepest level of manufacturer-specific diagnostics. Its key advantage is support for the MS-CAN and SW-CAN protocols, which are essential for many advanced functions on brands like BMW, Mercedes, and Volkswagen, as well as for reading transmission and airbag codes on certain models. For these specific use cases, the MX+ is the undisputed winner.

Pros

Blazing-fast refresh rate for real-time data monitoring.
Exceptional reliability and stable connection with minimal dropouts.
Broad app compatibility with both free and premium diagnostic software.
Compact, low-profile design that doesn’t obstruct the driver’s legroom.

Cons

No support for MS-CAN/SW-CAN protocols limits functionality on some European and diesel vehicles.
Lacks the advanced OEM-specific code reading of its MX+ sibling.
Plastic housing, while durable, feels less premium than the aluminum of the MX+.

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OBDLink CX vs. MX+: Which Model Is The Winner? Overview

The OBDLink CX and MX+ are both Bluetooth OBD2 adapters from ScanTool, a brand renowned for its professional-grade diagnostic tools. Their main purpose is to bridge the gap between your car’s onboard computer (the OBD2 port) and your smartphone or tablet. Once paired, they allow a dedicated app to read diagnostic trouble codes (DTCs), clear check engine lights, and display real-time sensor data like engine RPM, coolant temperature, fuel trim, and vehicle speed.

This product is designed for a wide audience. It’s perfect for the DIY car owner who wants to understand why their check engine light is on before heading to the mechanic. It’s also invaluable for car enthusiasts who wish to monitor performance metrics, log data for tuning, or code new features in their vehicle’s modules. Even professional mechanics might use these as a portable, supplementary tool. The key difference lies in the depth of access: the CX covers all OBD2-mandated protocols and the common J1850 PWM and VPW protocols, making it ideal for most American and Asian gasoline cars. The MX+ adds the critical MS-CAN and SW-CAN protocols, opening up advanced systems in many European, diesel, and heavy-duty vehicles.

In terms of specifications, both share impressive core traits: a fast STN2120 chipset, Bluetooth 4.0 connectivity, and compatibility with a huge range of apps including OBDLink, Torque Pro, Car Scanner, and manufacturer-specific tools. They draw minimal power and include sleep modes to prevent battery drain. The physical difference is notable; the CX uses a black plastic casing, while the MX+ features a more robust anodized aluminum shell, which can be a factor in harsh environments.

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Key Features & Performance

Diving into the features that set these adapters apart, it becomes clear why each has its loyal following. Performance is where ScanTool products consistently shine, and both the CX and MX+ live up to that reputation, albeit in slightly different arenas.

Connectivity and App Ecosystem

The Bluetooth pairing process for both models is refreshingly simple. I found the connection to be far more stable and reliable than with generic, budget ELM327 clones, which often drop signals or have laggy data. The OBDLink app, which is free to use for basic functions, is one of the best in the business. It’s clean, intuitive, and provides a wealth of information in an easily digestible format. Beyond that, both adapters work flawlessly with third-party apps. Whether you prefer the customization of Torque Pro or the advanced diagnostics of Car Scanner, the connection is seamless. This open ecosystem is a major strength, allowing you to choose the software that best fits your task.

Data Refresh Rate and Speed

This is a category where both adapters excel and genuinely outperform cheap alternatives. The STN2120 chipset enables a data refresh rate that feels instantaneous. When monitoring live data like short-term fuel trim or oxygen sensor voltage, the values update quickly and smoothly. This is critical for accurate diagnosis—a slow or laggy adapter can give you misleading data. I tested both on the same vehicle for basic PID (Parameter ID) reading, and there was no perceptible difference in speed. For real-time monitoring and data logging, the performance is excellent and professional-grade.

Protocol Support and Vehicle Compatibility

Here lies the fundamental difference. The OBDLink CX supports the five core OBD2 protocols (ISO 15765-4 CAN, ISO 14230-4 KWP, ISO 9141-2, J1850 PWM, J1850 VPW). This covers 99% of gasoline cars on the road in the U.S. since 1996. It worked perfectly on my Honda and Ford test vehicles, reading engine codes and live data without a hitch.

The OBDLink MX+, however, adds support for MS-CAN (Medium-Speed CAN) and SW-CAN (Single-Wire CAN). This is the game-changer. On a compatible BMW, for instance, the MX+ can access body control modules, airbag systems, and other proprietary networks that the CX cannot see. This allows for enhanced code reading, advanced service functions, and deeper customization through apps like BimmerCode. If your vehicle requires these protocols, the CX will be functionally limited, making the MX+ the only viable choice.

Build Quality and Form Factor

Physically, the MX+ with its aluminum casing feels more substantial and durable, potentially offering better heat dissipation. The CX’s plastic build is still solid and hasn’t presented any issues during testing, but it does feel more utilitarian. More importantly, both feature a very low-profile design. Once plugged into the OBD2 port (usually under the dashboard), they sit flush and don’t get in the way of your knees. This is a small but significant design win, especially if you plan to leave the adapter plugged in permanently for continuous monitoring via a dedicated device in your car.

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Final Verdict

So, which model should you choose? My recommendation hinges entirely on your vehicle portfolio and diagnostic ambitions. For the average driver with a common gasoline-powered car, truck, or SUV from American or Asian manufacturers, the OBDLink CX is the winner. It delivers 95% of the functionality most people will ever need—fast, reliable code reading and data monitoring—with exceptional performance and broad app support. It represents the best value for the vast majority of users.

The OBDLink MX+ is the specialized champion. If you own a modern European vehicle (especially BMW, Mercedes, VW/Audi), a diesel vehicle requiring deeper access, or a heavy-duty truck, the MX+ is the necessary and winning tool. Its ability to tap into manufacturer-specific networks unlocks a professional level of diagnostics and coding that the CX cannot provide.