thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool Review: The Pro-Level DIY Scanner We’ve Been Waiting For?

There’s a universal dread that grips every driver when an unfamiliar light flickers to life on the dashboard. For me, it was a persistent “Check Engine” light on my trusty old commuter car. It ran fine, but the glowing orange symbol was a constant, nagging source of anxiety. Was it a loose gas cap or a catastrophic transmission failure waiting to happen? A trip to the dealership meant a minimum diagnostic fee that could easily eclipse the cost of the actual repair. Trying to solve it with a cheap, basic code reader was an exercise in frustration, offering cryptic P-codes with little context. This dance between expensive professional help and the limitations of entry-level tools is a familiar headache for any hands-on car owner. It’s in this “diagnostic no-man’s-land” that a powerful, intuitive tool becomes not just a convenience, but a necessity for reclaiming control over your vehicle’s health.

What to Consider Before Buying a Professional-Grade Automotive Scan Tool

An advanced diagnostic tool like the thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool is more than just an item; it’s a key solution for bridging the gap between the ambitious DIY mechanic and the professional technician. It’s an investment in saving countless hours of guesswork and potentially thousands of dollars in diagnostic fees and unnecessary repairs. These tools move beyond simply reading engine codes. They allow you to communicate with nearly every computer module in your vehicle—from the ABS and airbags to the transmission and body control modules. The main benefit is empowerment: the ability to perform active tests, reset maintenance reminders, and even code new components, tasks that were once the exclusive domain of dealership-level equipment.

The ideal customer for this type of product is the serious home mechanic, the burgeoning enthusiast who works on their family’s fleet of cars, or the small independent repair shop owner needing a powerful yet affordable secondary tool. If you find yourself frequently troubleshooting complex issues, performing maintenance that requires electronic resets (like electronic parking brakes or battery management systems), or wanting to test individual components like fuel pumps and injectors without tearing the car apart, this is for you. Conversely, it might be overkill for someone who simply wants to read and clear an occasional check engine light. For that user, a simpler, more affordable Bluetooth OBD2 dongle might be a better fit. The investment in a pro-level scanner is justified by its depth and breadth of features, which a casual user may never fully exploit.

Before investing, consider these crucial points in detail:

• Dimensions & Space: In a garage environment, portability and usability matter. The thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool is built around an 8-inch tablet. This size is a sweet spot—large enough for clear data graphing and easy touch navigation, yet compact enough to hold in one hand while working under the hood or inside the cabin. The wireless Bluetooth VCI (Vehicle Communication Interface) dongle is a massive advantage, freeing you from being tethered to the OBD2 port.
• Capacity/Performance: This is the heart of the scanner. Key metrics include processing power (Android 10 OS, 4GB RAM, 64GB ROM for fast operation), vehicle coverage (140+ brands), and most importantly, the functional depth. Look for true bidirectional control (active tests), a comprehensive list of service resets (34+ in this case), and advanced functions like ECU coding. These features separate a professional tool from a simple code reader.
• Materials & Durability: A workshop is a tough environment. The tool needs to withstand drops, grease, and grime. The THINKSCAN 689BT features a ruggedized rubber casing around the tablet, providing essential impact protection. The included hard-shell carrying case is not an afterthought; it’s a critical component for protecting your investment and keeping all the adapters and cables organized.
• Ease of Use & Maintenance: A powerful tool is useless if it’s impossible to navigate. The Android-based operating system provides a familiar, intuitive tablet experience. A crucial long-term consideration is software updates. The promise of lifetime wireless updates with no subscription fees is a massive value proposition, ensuring the tool doesn’t become obsolete as new vehicles and features are released.

Choosing the right diagnostic tool can transform how you approach automotive repair, turning complex electronic puzzles into solvable problems.

While the thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool is an excellent choice, it’s always wise to see how it stacks up against the competition. For a broader look at all the top models, we highly recommend checking out our complete, in-depth guide:

First Impressions: Unboxing a Comprehensive Diagnostic Arsenal

From the moment you open the box, the thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool makes a statement of professionalism. It arrives in a sturdy, semi-rigid zippered case that immediately inspires confidence. Inside, every component has its place in precision-cut foam. You’re greeted by the 8-inch tablet, which feels substantial and durable thanks to its protective rubberized bezel. On the back, the compact Bluetooth VCI dongle is neatly docked in a magnetic holder—a clever design touch that prevents it from getting lost. The kit is comprehensive, including a multi-region charger, an OBD2 extension cable, and even an FCA 12+8 adapter for accessing the security gateway on modern Chrysler, Dodge, and Jeep vehicles. Firing it up for the first time, the Android 10 OS boots in about 30 seconds. The touchscreen is bright, clear, and responsive, with very little lag. There’s no complicated registration process to get started; after a quick Wi-Fi setup to download the latest vehicle software, it’s ready to go. The initial feeling is that this isn’t a toy; it’s a serious piece of equipment designed for real-world garage use.

Deep Dive: Putting the THINKSCAN 689BT to the Test

A spec sheet can only tell you so much. To truly understand a diagnostic tool’s worth, you have to get your hands dirty. We put the thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool through its paces on a range of vehicles, from a 2010 Kia Sedona to a modern 2018 Mercedes-Benz GLE, to test its real-world performance, usability, and functional depth.

Bidirectional Control & Active Tests: The True Game-Changer

This is where the THINKSCAN 689BT truly separates itself from basic OBD2 readers. Bidirectional control, or “active testing,” is the ability to send commands from the scanner to the vehicle’s modules to test individual components. It’s like being able to ask a specific part, “Are you working?” without having to physically remove it. We tested this on a 2015 Chevrolet with a nagging EVAP system code. Instead of manually testing solenoids and valves with a multimeter, we used the scanner to command the EVAP vent and purge solenoids to open and close. We could hear the distinct clicks, confirming the components themselves were functional, which pointed us toward a potential leak in a hose—a diagnosis that would have taken significantly longer using traditional methods. One user perfectly captured this power, noting how the tool allowed them to quickly identify the source of engine misfiring issues on their Chevrolet Avalanche. The ability to perform injector buzz tests, cycle the ABS pump for brake bleeding, or command the radiator fans on and off fundamentally changes your diagnostic workflow, turning hours of guesswork into minutes of targeted testing. With a library of over 3000 active tests, the diagnostic power at your fingertips is immense and is, in our opinion, the single biggest reason to upgrade to a tool of this caliber.

OE-Level Diagnostics and a Universe of 34+ Service Functions

Modern cars are rolling networks of computers. A good scanner needs to talk to all of them, not just the engine control unit. We found the THINKSCAN 689BT’s “All System” scan to be thorough and relatively quick. On the Mercedes GLE, it successfully polled the Engine, Transmission, ABS, SRS (Airbag), TPMS, and even more obscure modules like the seat controllers and gateway module, pulling codes from each. The live data streaming is robust, allowing you to view sensor readings in text, analog, or graphical formats. We particularly liked the ability to graph up to four data streams at once, which is invaluable for diagnosing issues like a faulty oxygen sensor by comparing its readings to others in real-time. But the real day-to-day value for a DIYer lies in the 34+ service and maintenance functions. We performed an oil service light reset, an electronic parking brake (EPB) retraction for a brake pad change, and a steering angle sensor (SAS) calibration after an alignment. Each process was guided by clear on-screen instructions. The inclusion of functions like ABS bleeding, injector coding, and battery registration covers the vast majority of tasks a serious home mechanic will ever face. The fact that all these functions, and any new ones added in the future, are covered by lifetime free updates makes this a feature that truly sets it apart from subscription-based competitors.

ECU Coding, Customization, and the Reality of Advanced Functions

ECU coding is an advanced feature that allows you to make software-level changes to a vehicle’s computer. This can range from matching a new module to the car after a replacement to unlocking “hidden features.” For example, on certain VW/Audi models, you can use coding to enable features like needle sweep on startup or disable the annoying auto start-stop system. While we found the THINKSCAN 689BT capable of these functions, it’s crucial to understand that vehicle compatibility is key. The available coding options are determined entirely by the vehicle manufacturer, not the tool. It’s an area that requires caution and research to avoid causing issues. Some user reviews brought up a contentious point: key programming. One user was disappointed it couldn’t retrieve the PIN code needed for programming a new key, while another correctly pointed out that this is almost always a security measure by the carmaker. Most modern vehicles require a secure dealer login or a specialized locksmith tool to pull these PINs. While the THINKSCAN 689BT can perform the key programming *procedure*, you often need to obtain the security PIN from the dealership first. It’s a critical distinction and a reality of working on modern, secure vehicle systems.

Hardware, Usability, and the FCA Subscription Elephant

The physical tool is a pleasure to use. The Android 10 platform is fast and stable, a welcome change from older, laggy scanners. The 64GB of internal storage is more than enough to hold software for every car brand without having to constantly delete and re-download. The magnetic VCI dongle is brilliant; you plug it into the OBD2 port, and it stays out of the way while you work freely around the car with the tablet. Now, for the most significant “con” we and other users identified: FCA AutoAuth. To diagnose anything beyond basic OBD2 on a 2018 or newer Fiat, Chrysler, Dodge, Ram, or Jeep vehicle, you must bypass the Secure Gateway Module (SGW). The THINKSCAN 689BT supports this, but it’s not free. As one user bluntly put it, it’s not just “register it yourself,” it’s “Register AND Pay yourself” for a yearly subscription to the AutoAuth service. Thinkcar isn’t hiding this, but it’s a crucial piece of information that can be easily missed. While the necessary 12+8 cable is included, be prepared for this additional annual expense if you plan to work on modern FCA vehicles. This isn’t a flaw of the tool itself—all third-party scanners face this—but it is a critical factor in the total cost of ownership that every potential buyer must consider. Despite this, the overall value proposition remains strong, but transparency is key. You can see its full feature set and compatibility details online to verify if it meets your specific needs.

What Other Users Are Saying

Our findings were largely echoed by the broader community of users. There’s a strong positive sentiment, especially from beginners and seasoned DIYers who appreciate the tool’s power and ease of use. One user celebrated it as “AMAZING FOR BEGINNERS, & LIFETIME OF FREE UPGRADES!” highlighting two of its most significant selling points. Another detailed how they, as a novice, successfully diagnosed issues on both a 2010 Kia and a 2018 Mercedes, praising how “detailed and useful” it was. Many, like us, were impressed with the build quality, with one review noting its “solid and professional” design and another appreciating the “well built unit with impact protection.”

However, the feedback isn’t universally glowing. The most common complaint, which we confirmed, revolves around the paid FCA AutoAuth subscription. One user was clear: “First off the main negative… Register AND Pay yourself for a yearly subscription.” Some users also ran into vehicle-specific limitations. One reviewer stated it “would not battery match on a Dodge” and couldn’t connect to certain Fords, while a long-time professional with decades of experience found it “very lacking” compared to his high-end, multi-thousand-dollar scanners. This feedback is relevant as it sets realistic expectations: while incredibly powerful for its price, it’s not a direct replacement for a $5,000+ dealership-level tool and may have occasional quirks with specific models or functions.

How Does It Compare? The THINKSCAN 689BT vs. The Competition

The thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool occupies a competitive space. While it offers a fantastic blend of features and value, several alternatives might be a better fit depending on your specific needs and budget.

1. TOPDON TopScan Lite OBD2 Bluetooth Bi-Directional Scanner

The TOPDON TopScan Lite is a strong contender for those who prefer to use their existing smartphone or tablet as the display. It’s a compact Bluetooth VCI dongle that pairs with an iOS or Android app. Its main advantage is portability and a lower entry price. It offers full system diagnostics and impressive bidirectional controls for its size. However, it’s a step down in power, offering only 8+ service resets compared to the THINKSCAN’s 34+. It’s an excellent choice for the DIYer who wants bidirectional capabilities without investing in a dedicated tablet and whose needs are covered by the more limited set of service functions.

2. OBDeleven OBD2 Diagnostic Tool Scanner Next Gen

The OBDeleven is less of a generalist and more of a specialist. It is the go-to tool for enthusiasts of Volkswagen Auto Group (VW, Audi, Seat, Skoda) and, more recently, BMW and Toyota brands. While it can perform basic OBD2 scans on any car, its true power lies in the deep-level coding and adaptations it offers for its supported brands, often through user-friendly “One-Click Apps.” If you primarily work on VAG or BMW vehicles and want to perform extensive customizations and coding, the OBDeleven is arguably superior. However, its all-system diagnostic and service functions for other brands are far more limited than what the thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool provides across its vast vehicle list.

3. BlueDriver Bluetooth Pro OBDII Scan Tool

The BlueDriver is one of the most popular and highly-regarded OBD2 scanners for the average DIYer. Its strengths are its user-friendly app, excellent live data capabilities, and detailed repair reports which suggest verified fixes for specific trouble codes. It’s a fantastic tool for reading and clearing codes from multiple systems (Engine, ABS, SRS, etc.) and is a significant step up from basic code readers. However, it lacks the key feature that defines the THINKSCAN 689BT: bidirectional control. You can’t use the BlueDriver to perform active tests or most advanced service functions like electronic brake caliper retraction. It’s the perfect tool for diagnosing, but not for actively testing components.

The Final Verdict: A Powerful Tool with One Important Caveat

After extensive testing and analysis, we can confidently say the thinkcar THINKSCAN 689BT Bi-Directional Automotive Diagnostic Tool is a phenomenal piece of equipment for the price. It successfully brings pro-level features like comprehensive bidirectional control, a vast array of service functions, and even ECU coding capabilities into the realm of the serious home garage. The fast, durable hardware, combined with the incredible value of lifetime free updates, makes it a forward-thinking investment that won’t become obsolete in a year or two.

It’s the ideal tool for the enthusiast or small shop owner who has outgrown basic code readers and needs the power to diagnose complex systems and perform advanced maintenance. Its only significant drawback is the required paid subscription for FCA AutoAuth, a reality of the modern automotive world but a crucial factor to consider. If you don’t frequently work on 2018+ Chrysler/Dodge/Jeep vehicles, this is a non-issue. If you do, factor that annual cost into your budget. For its sheer depth of functionality and long-term value, the THINKSCAN 689BT earns a strong recommendation as a top-tier diagnostic solution. If you’re ready to take your diagnostic capabilities to the next level, we highly recommend you check the latest price and availability for the THINKSCAN 689BT.