Not long ago, diagnosing a car issue meant one thing: booking a visit to the mechanic. If the check engine light appeared or your vehicle began making an odd noise, your only real option was to head to a professional repair shop. There, they’d use expensive diagnostic tools to pinpoint the issue, tools out of reach for the average car owner. But times have changed, and DIYers have modern tools to diagnose car issues.
In recent years, a significant shift toward DIY car diagnostics has occurred. Thanks to affordable and accessible tools, such as OBD2 scanners, even the most casual car enthusiast can now read engine codes, understand what the warning lights mean, and often resolve the issues.
The technology that turbocharged this new wave of DIY diagnostics is the standard OBD2, as this allows any external tool to interface with your car’s computer. Bidirectional OBD2 scanners, although least known on the market, are fundamentally changing what the DIY and professional communities are capable of.
However, not all scanners are created equal.
Next up are bidirectional scanner tools that read all vehicle data and control car systems, proving invaluable for in-depth diagnostics and accurate vehicle repairs.
Table of contents
What Is a Bidirectional OBD2 Scanner?
These basic OBD2 tools can read and reset fault codes. Although this is functional, it hardly scratches the surface of what is possible with modern automotive diagnostics.
A bidirectional OBD2 scanner, in contrast, is more than an observer; it communicates with the vehicle.
Definition:
A bidirectional scanner not only reads data from the vehicle’s control modules, such as the engine, transmission, or anti-lock braking system (ABS), but also sends commands back to these modules. This concept of two-way communication allows real-time testing and activation of functions.
Example Functions:
- Engage the radiator fans in order to check the proper functioning of the cooling system.
- Turn fuel pumps on/off for pressure tests.
- Initiate sensor relearn procedures (e.g., throttle, steering angle, crankshaft position)
- Cycle ABS components during brake bleeding
- Reset service lights or perform battery registration.
This is indeed a game-changer in control. It also enables more precise and faster diagnostics for professional mechanics. It also gives the DIYers their newfound confidence and the ability to check if the repair has been successful.
Key Benefits for Hobbyists and DIYers
When it comes to bidirectional tools, the entire situation changes significantly for the DIY car enthusiast. Let’s take a look at what makes this tool such a big thing:
1. Speedier Target Diagnostics
A car owner would be obliged to replace three or four of its parts to solve a single problem, depending on the composition of fault codes provided by the coded report. Without bidirectionality, the user is compelled by design to throw components at problems before determining if they’re worth their effort. Before installing a repaired part, it can be tested along with the scanner, not only at the end of a replacement but also before it has been inserted.
Reduces trial-and-error repairs and part replacements.
2. Security of Your Work
Just way behind the biggest irritations of a do-it-yourself repair is knowing whether it worked at all. Now, with a bidirectional scanner, you can trigger or test the part you just installed before reassembling everything or driving off.
3. Access to Advanced Maintenance Features
Bidirectional scanners open the door to more complex tasks, such as:
- EPB (Electronic Parking Brake) reset
- The oil service light reset
- Battery replacement registration
- Injector coding
- Throttle position and idle relearning
These functions, once exclusive to high-end shop tools, are now accessible through advanced consumer-grade scanners to DIYers.
Among the most feature-rich scanners, the Foxwell NT710 stands out with advanced diagnostics, ECU access, and deep system coverage for BMW and a wide range of other vehicle brands.
Its precision and versatility make it a favourite among both serious DIYers and professional technicians.
What to Look for in a Bidirectional Scanner
If you’re considering purchasing a bidirectional OBD2 scanner, it’s essential to know what separates a good tool from a great one. Here are the key features to evaluate:
| Feature | Why It Matters |
| Vehicle Compatibility | Ensure support for your specific vehicle make, model, and year |
| Bidirectional Functions | Look for actuator tests, relearn procedures, and service resets |
| System Coverage | Engine, transmission, ABS, SRS, EPB, BMS, and more |
| Ease of Use | Clear menus, responsive interface, and robust construction |
| Update Support | Free or low-cost software updates to stay compatible with newer car models |
Why the Foxwell NT710 Excels
The Foxwell NT710 is a standout in the world of bidirectional scanners, thanks to its balance of power, usability, and brand-specific features.
Here’s a breakdown of why it’s such a compelling choice:
| Feature | Foxwell NT710 Highlights |
| Compatibility | Preloaded with BMW/MINI support; additional brands supported via software activation |
| Bidirectional Control | Yes – Actuator tests, system resets, and component-specific commands |
| Coding & Programming | Supported for BMW, VW, Audi, Porsche, etc. (based on VIN and brand-specific activation) |
| Interface | Large, easy-to-read touchscreen with intuitive navigation |
| Software Updates | Lifetime free updates for the default brand; optional packages for others |
According to this in-depth analysis, the NT710’s ability to perform advanced bidirectional diagnostics and ECU functions places it well above other scanners in its price range.
Feature Overview by Vehicle Type
Depending on your vehicle brand, the NT710 provides varying degrees of functionality. Here’s a snapshot of what users can expect:
BMW, MINI, Rolls-Royce Vehicles
Special Functions Supported：
- Oil Light Reset
- EPB Reset
- SAS Calibration
- Battery Reset
- ABS Bleeding
- Throttle Matching
- TPMS Reset
- DPF Regeneration
- Injector Coding
- EVAP Test
- Seat Calibration
- Headlight Matching
- Window Calibration
- Language Change
Multi – Brand Compatibility Instructions
In addition to BMW – series vehicles such as BMW / MINI / Rolls – Royce, the Foxwell NT710 also supports a variety of mainstream vehicle brands (e.g., BMW, VAG, BENZ, GM, Chrysler, FORD, HONDA, etc.), and the operation is more flexible and intuitive:
Selection Logic
Select the Exclusive Vehicle Model When Placing an Order: When purchasing, you can directly select the corresponding brand software package (e.g., “NT710 With FORD Software” “NT710 With Toyota Software”) and use it right after receiving the product.
Additional Software Packages Required for Multiple Vehicle Models: If you have vehicles of multiple brands, you need to purchase the corresponding software package separately for each additional vehicle model and activate it (activated once, usable permanently). Learn more about the additional software for NT710
Functions After Activation (Subject to the Selected Brand)
- Dynamic component testing (e.g., transmission, brake system actuator testing)
- In – depth ECU interaction (reading control unit data, executing maintenance / repair instructions)
- System reset and self – learning (battery replacement matching, throttle reset, etc.)
Note: The specific function coverage varies depending on the vehicle brand, year, and configuration. It is recommended to check the compatibility list or contact Foxwell official customer service before purchasing.
Core Advantages
- Supports flexible selection and installation of multi – brand software. Whether you are a multi – vehicle owner (DIY enthusiast) or a comprehensive repair technician, it can precisely match your needs, and one set of equipment can cover the diagnosis of multiple brands.
- Lifetime free upgrades. All purchased software can enjoy lifetime free update services. There is no need for additional subscriptions or renewals, so that your equipment can always maintain the latest functions and vehicle model coverage (most similar products only support 1–3 years of free upgrades).
Real-World Scenarios Where the NT710 Shines
Here are just a few practical examples of how the NT710 proves its value:
- Brake Service on BMW
Use the tool to release and reset the electronic parking brake when changing rear brake pads. - Battery Replacement in a Mini Cooper
Register a new battery so the car recognizes the change and charges correctly, which is critical for the electrical system’s health. - Throttle Relearn on a Ford F-150
After cleaning or replacing the throttle body, use NT710 to initiate relearn, preventing idle or acceleration issues. - ABS Bleeding on a VW Passat
Activate the ABS solenoids during brake fluid changes to ensure a proper, air-free brake system.
These scenarios highlight how a tool like the NT710 saves both time and the cost of shop visits while offering dealership-level accuracy.
Final Recommendation: Choosing the Right Tool
There are several types of OBD2 scanners on the market. Here’s a comparison to help you make an informed decision:
| Tool Type | Best For | Limitations |
| Basic Code Readers | Casual drivers who just want error codes | Limited to reading/clearing fault codes |
| Smartphone-Based Tools | Tech-savvy users with simple needs | Often dependent on app/software subscriptions |
| Handheld Bidirectional Tools | DIYers and professionals | Higher upfront cost, but offers full functionality |
If you’re serious about maintaining your vehicle or improving repair accuracy, a bidirectional scanner is worth every penny.
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Conclusion: The Future of Vehicle Maintenance Is in the Hands of DIYers
With the growing complexity and software dependency of vehicles, the tools for their maintenance are also bound to evolve. Bidirectional OBD2 scanners must now be seen as necessities, not luxuries, for providing precise and reliable diagnoses and repair work.
The Foxwell NT710 boasts a sophisticated design, a user-friendly interface, and wide network compatibility with supported models. ABS bleeds through ECU programming, which affords dealership-level capabilities in a small, affordable package for those who dare to undertake the responsibility.
Whether you’re unlocking hidden features in a BMW or diagnosing a no-start issue on a Ford, this scanner is built to support you and other DIYers.
