9 Best OBD2 Scanners with Bidirectional Control for 2026 – Expert Reviews

Customer Review: “First off, I’m pretty impressed with the VDIAGTOOL D200 OBD2 Bluetooth Scanner. You have the power of a diagnostic tablet without having to lug one around. I use a similar one from Mopar everyday and I love the concept of less is more. For customer’s vehicles that aren’t Stellantis brand this fills the gap nicely. Set up was simple simply plug it in to the port, create an account and your good to go. It has tons of features that are very helpful whether you are a seasoned technician or an everyday consumer looking to save a few bucks from the shop. A few features I found useful are as follows:- live data which is extremely useful when trying to pinpoint a concern in live time ( my personal favorite part of any diagnostic tool.- Scan feature which will scan your entire vehicle and show you any DTC’s (Codes) some that are even hidden when using my other scan tools.-links next to the codes that will give you a better idea of why the codes are set.- Several vehicle reset and learning features that aren’t available with certain tiers of other brands.- Power similar to those of the big brands do at a fraction of the price ( One of the biggest upsides for someone advanced or new to Automotive Repair looking to professionally repair while saving money on cost as well)- live customer serviceOverall, I am completely satisfied with this device. It gives me the power and assistance to properly diagnose a vehicle in a timely manner regardless of Brand of vehicles. I find the VDIAGTOOL D200 will be useful for anyone new to the automotive repair industry, or a seasoned veteran looking to replace or add to their arsenal. It is packed full of features you would have to spend elsewhere. At the price point it may even pay for it self the first time used considering it cost $200/hr at the shop I’m at for an hr of diag alone.”

Customer Review: “I will be very honest, this tool has more capabilities than what any mechanic or technician will use during normal day to day scanning. First, I love it includes a storage mini case, inside you have the USB C and adapter but so far I don’t know for what or when I’m going to use them. The setup was very easy, you have to download and install all the updates to be able to use it. The special functions is my favorite part to use, here you can do a lot of normal routine resets and also some setup like automatic window reset, on the diagnostic section I was able to make recordings of engine data and also play them back later without having the vehicle connected to the VCI. This tool has great capabilities for this price, also the “Mall” inside the app you can buy to get even more functionality including some module programming abilities but I have not get those at the moment. The output test for each module is very nice, I was able to test door locks without touching the lock and unlock buttons, also the park release solenoid activation without having to press the brake pedal, this little scanner can do a lot. I’m very happy with it and looking to see what else I find during later uses, really recommend it to have inside you car for any emergencies.”

Customer Review: “At this point in time, this is a fantastic tool. I say this because of the free extended analysis and recommendation provided by the app on your phone. The tool collects the data and generates a report on your phone that is extremely helpful in diagnosing and repairing car problems. The tool itself is a very well made product with an easy to see display. Feels solid. It connects quickly and provides the scanner data that we expect to see when connected to the car. I am not a mechanic, but I am not afraid to dig into mildly complicated repairs and maintenance. I bought this tool when I had a check engine light come on during some rough engine idling. I suspected ignition coils. The tool scanned and reported a cylinder misfire, the data then transferred to my phone via Bluetooth. The app the generated a report which recommended replacing ignition coils and spark plug. This was spot on. After replacing the coils and spark plugs, the engine ran fine. I cleared the codes and the car has been running perfectly. I saved a thousand dollars on this repair. No joke. While tools like these are useful, the data they generate require experience to understand. This is where the app really shines. It cuts to the recommendation without having to understand all the nuances. Subsequently, I have taken some time to learn about scan tool modes and data from various YouTube videos and this has really enhanced the experience using this tool. Trust, but verify, you know. I am very satisfied with this scan tool and the free repair application. As long as the app remains free, this is a very useful tool. You can learn a lot and it works better than any other scan tool I have owned. Highly recommended.”

Customer Review: “Just got this beauty. Have not gotten to use it yet. The warranty process is very easy. We are getting the updater tool to ensure it has the updated firmware. Will Update once we have used it. Easy, Screen is clear, I was able to grab this at a time there was an additional 15% Promotional deal giving us an additonal $42 off from $279..00. $279.00 is a steal for this product and the promotional made this one of the best the prices ever. Ladies don’t wait your man will love this device. Works on any cars from 1996 to current makes once the new year firmware is updated. Your man will love you for this device. Grab one now! Help your man fix & diagnose your car with great diagnostics! It worth every penny!”

Customer Review: “I recently purchased the TopScan Pro OBD2 Scanner by TOPDON, and I’m very happy with it. It was easy to connect to my phone via Bluetooth and worked smoothly with both Android and iPhone. The app is user-friendly and provides clear explanations of trouble codes, which made diagnosing my vehicle much easier. I really like the live data feature and the bi-directional control options. It feels like a professional-grade scanner at a reasonable price. Overall, it’s a great tool for anyone who wants to save money by diagnosing car issues at home. I would definitely recommend it.”

Customer Review: “The media could not be loaded. This TOPDON TopScan Pro OBD2 scanner is extremely easy to use and connects quickly to my phone via Bluetooth. The app interface is clean, intuitive, and provides accurate trouble codes and live data in real time. I’ve used it on multiple vehicles and the diagnostics have been spot-on every time, including clearing engine lights without any issues. The build quality feels solid and the scanner stays connected reliably while driving or idling. For the price, this is an excellent diagnostic tool for DIYers and anyone who wants professional-level insight without paying shop fees.”

Customer Review: “I’ve owned the Anyscan A30M for over a year and thought it was great for the money. I used it with my IPad. I used it to help fix a couple of my cars and some friend’s cars. The bi-directional and live data features made this a very useful tool and much better than most other scanners in the price range. The updates were free, without needing a subscription, which made this a very cost effective scanner. Then it just stopped working when I really needed it. It would not communicate with my Ipad. I went to the Xtool website but there was no mention of any problems so I thought it was a problem with my A30M. Since I liked the device so much and had a car with some issues, I immediately bought a new one but this new one had the same problem so I wrote to Xtool to tell them there may be a problem with their device. I learned the problem was caused by a software update. They emailed me that the experts were working on a fix and it will be working again in a couple of days. That was over two weeks ago and my new A30M is still not working with my Ipads. There was an update for the app (6.2.1) on the Apple store. I deleted my old version of the App and got the latest version but now It has a new problem. It gives a bluetooth failure error during startup. It still will not communicate with my Ipads. I have three Ipads and none of them can communicate with the A30M. I tried an old Samsung tablet that I had and I was able to get the A30M working. I still have a few issues even with the Samsung, but at least it works. It has been very frustrating trying for a couple weeks to get it to work with my Ipads. If you have a Android tablet you may be in luck but if you want to use it with an Ipad you may have some problems. Xtool emailed me that everyone else have gotten their A30M working again (but not me). Such a shame for what was a once a fantastic tool. If they come up with a fix that actually works with an Ipad, I’ll update my review. Update**** It works with my Ipad again. This after I bought a new Samsung tablet for the device. I couldn’t wait any longer so I ended up buying the Samsung Tablet to get the A30M to work. I had not been able to use the device for about three weeks and I had a Jeep in need of repair so I bought an Android tablet. Xtool kept in touch and kept helping with my old Ipad and yesterday, after deleting the APP for the third time, rebooting my Ipad and reloading the App onto the Ipad, they finally connected. I was happy because I really like my Ipad Pro but after using both the Android and the Ipad, I think I’m going to keep using the Samsung because it seems to work a little better with the A30m. I also like the interface between the A30M and the Android (Samsung) better. I was very happy with the Xtool support. I think I emailed them just about everyday and they always answered back quickly. They never gave up trying to help. I’ll rate the A30M 5 stars in the future if it keeps working.”

Customer Review: “⭐⭐⭐⭐⭐ 10 STARS! This Tool Proved the Shop Wrong and Saved Me Thousands! If you do any work on your own cars, STOP SEARCHING AND BUY THIS. The XTOOL Anyscan A30M V2.0 is the best investment I’ve ever made. It has already paid for itself ten times over by catching expensive mistakes that professional mechanics missed. Real-World Wins with this Tool: The “Fan” vs. “Thermostat” Mystery: The shop insisted my cooling fan was dead and wanted to charge me for a replacement. I used the Bi-Directional controls on the A30M to diagnosed, the real issue was the thermostat, replaced it myself, and the car is back to normal. The “Starter” Lie: A shop told me my starter was going bad because auto off feature stopped working and quoted me a fortune. I used the tool to check the system and proved it was actually just a weak battery. I replaced the battery and used the Battery Reprogramming feature to register it to the car in minutes. Headache avoided! The “Dead” Power Seat: My electronic seat stopped moving and I thought the motor was fried. I used the Seat Normalization feature to run the calibration (moving it up, down, left, right, forward, and back). Now the seat works perfectly—no parts needed! Brakes & More: I diagnosed my brakes with zero issues and used the service resets to finish the job professionally. Why this is the “Best Ever”: The app is incredibly useful and intuitive for both Android and iPhone. Having dealership-level features like Crank Sensor Relearn, EPB, and Throttle Relearn in my pocket is a game-changer. Plus, the Lifetime Free Updates mean I never have to pay a monthly subscription fee like other brands. Bottom Line: This tool gives you the power to challenge a mechanic’s “diagnosis” with real data. Don’t let a shop guess with your money—get this and know for sure!”

Customer Review: “The Ultimate Diagnostic Powerhouse (5/5 Stars) I’ve used several scanners, but the Innova 5610 is in a league of its own. It’s not just a code reader; it’s a professional-grade diagnostic tool that saves me hundreds in dealership fees. What I Love: Bidirectional Control: This is the game-changer. I can actually send commands to the car—like testing the fuel pump, AC clutch, or electronic parking brakes—to see exactly what’s failing before I start pulling parts. Dealership-Level Features: It handles advanced tasks like ABS bleeding, battery initialization, and oil light resets that most consumer scanners can’t touch. Comprehensive Coverage: It provides enhanced diagnostics for ABS, SRS (airbags), transmission, and engine systems across almost all vehicles from 1996 and newer. Repair Integration: The Bluetooth pairing with the RepairSolutions 2 app is seamless, giving me access to a massive database of verified fixes for the specific codes it finds. Verdict: If you’re a serious DIYer or a mechanic who wants dealership-level calibration and relearn capabilities at a fraction of the cost, this is the one to get. It’s robust, fast, and incredibly intuitive.”

Customer Review: “The 2025 Kingbolen Ediag Elite OBD2 scanner came in a sleek/modern design. It arrived inside its own little case and was nicely packaged. The black and silver reinvented design was somewhat appealing, but mostly the lifetime free software update (no yearly renewal) was the deal breaker for me. The device came packed with all vehicle systems, 15 service resets, and lifetime free software update. It seems solid enough although not rubberized on the outside like the other Ediag. Instructions on how to install the Ediag app and create an account to activate the device were included in the box. When the device is plugged into the OBD2 port of the car, it shows a green light; once you access the Ediag app and tap any function, the light turns blue. The first time, you may have to wait a little for the system to be updated for your specific vehicle. Then, you can run a health test that will show you the overall state of your vehicle while pinpointing each specific issue. You have the option to save the findings as a report or PDF file and they will be saved in the app icon titled “Reports”; it also has an app icon titled “History” that contains all the vehicles that you have diagnosed with the scanner. This is an amazing device for that price and it comes with so many perks. While I wish that the manufacturer would have kept the outside rubber cover in the Ediag Elite design for added protection, I really like the modern look of the device. When not in use, I will make sure to keep the device in its hard case so that it lasts a long time allowing me to enjoy the free lifetime updates. Currently, the cost of the device is around $100 on Amazon. For the things I was able to observe, do, and even manipulate in my vehicles with the Ediag Elite (easily turned off that TPMS light), it is worth every penny in my opinion. This device can access the immobilizer to program keys for some (not all) vehicles. The special functions I tested all worked well and without any issue. At this price and for the time being, I think that it is fair to give this device a rating of 4.75 out 5 as it meets expectations for functionality, connectivity, ease of use, portability, and level of accuracy. If the outside of the device was rubberized, I would have definitely given it the full 5 stars in my first impression review. I will report back if I see any change in these expectations as I continue to use the device.”

Customer Review: “Just like the title says, this is a great diagnostic tool! And the price? Hard to beat for what you get with this unit, particularly because it’s currently on sale as I’m writing this review. I tested this tool on my 3 vehicles without any issues. Two of them had zero codes, but one needed a service reset which was a breeze with the S608. On my Range Rover, I was able to successfully diagnose a bad connection to the SRS (air bag) on the driver’s side. I’ve known about this issue, but the S608 was able to quickly confirm it. I reset the code with ease. I’ll add some pros and cons (yes, there are some) below, but here’s a couple highlights. What I like most is how easy it is to use. It boots right up to the main screen with nice large icons. The physical buttons on the right are a nice touch that add to the experience, instead being an unnecessary throwback to the old school diag tools. They have a good, solid feel to them and respond well. The menus are simple and straightforward, and that’s a good thing. I never felt like I had to search for any functions. The live data streams work great and the ability to graph them is a huge bonus. This tool has a lot of premium features more commonplace on expensive units, hence the great value. The lifetime software updates blew my mind. Almost no one does that. It’s a little ridiculous that you pay $1000+ for a high-functioning scanner, then get hit with subscription fees of hundreds of dollars a year after your initial subscription period ends. You literally never have to worry about that here and that’s amazing. Lastly the hardware/software combo is perfect as I never experienced any lag. I have a $1300 tool by a different manufacturer and this one blows that away in terms of speed. Granted the $1300 tool performs many more functions, but it’s a chore to use waiting for menus to come up. Not so, here. This will be my go-to for every day use while my other more expensive tool will be used mainly for complex diagnostics and for troubleshooting other systems not covered by this unit. The S608 is perfect for a DIY home mechanic looking for a versatile diagnostic tool that’s a great value. The S608 will handle what 95% of home mechanics need. PROS Easy to use, very good battery life, live customer support, lifetime updates, fast, good range of functions. CONS The screen should come with a temp screen protector. My unit had some light scuffs on the screen when I unboxed it. A longer ODB cable would be nice. The cable is perfect if you’re sitting in the driver’s seat, but won’t reach anywhere outside of that. You could probably even purchase this separately, if needed.”

Customer Review: “Has exceeded my expectations for the price and features it offers. Right out of the box, it feels solid and well-built, with a rugged design that’s perfect for garage use. The screen is bright, clear. Setup is quick and straightforward. It connects quickly to vehicles and reads codes fast without lag.”

Customer Review: “It works well and has a lot of data points. I bought it for brake jobs on my cars with electronic parking brakes. Can’t do brake jobs without being able to release the electronic brake on rear wheels. Some things to know: Look on the box to find the app to download. No QR code to scan. I tested it on my Iphone 11 and android tablet. Works on both. It takes time to connect phone/tablet to dongle the first time. Be patient! Make sure your Bluetooth is activated on phone or tablet. DO NOT TRY TO CONNECT BLUETOOTH ON PHONE OR TABLET. Use the Bluetooth icon on top left corner of KDIAG main page. On Iphone devices you have to go into settings to allow the KDIAG to connect to apple devices. It’s an apple thing! Google it. Its not a professional scan tool, it’s damn good for weekend diy mechanics. It offers a lot for $39,99 on Amazon. I looked all over, it’s the best bang for the buck I could find. New cars are going to electronic parking brakes, you need bidirectional commands to activate components on cars for repairs It has graphing, a plus in my mind. It has a dash board for test driving, another plus in my mind. I researched KDIAG, it appears they have been in the car scanner business for decades mostly in Asia. Looks like they are trying to break into the American market. Play with it when you get it, it takes some time to learn the programing. Not many YouTube videos for this scan tool. I give it 5 stars as long in continues to work. The reason I give it 5 stars is because of all the data it delivered for a low price point. Updates as I use it.”

Customer Review: “I bought this specifically for doing rear brakes and the advertised EPB function. It doesn’t work on my 2018 Chevrolet Equinox. It’ll read and clear codes but there’s so many cheaper options. This thing is Temu level junk.”

Customer Review: “Great diagnostic tool, it simply downloads your vehicle information and works! It is capable of pairing key fobs, and diagnosing engine codes. After identifying the engine codes, it proceeds to provide links to help the user better understand the problems and identify possible ways to fix them. Its easy to use, simply plug the device into the OBD-II port under the drivers console, install the app on your phone, follow the instruction to pair bluetooth, and diagnose your vehicle. Its saved me a lot of money by allowing me to identify problems and fix the ones that I am able to resolve on my own.”

Customer Review: “The Thinkdiag2 Bluetooth OBDII Scanner is a professional-grade diagnostic tool that elevates the capabilities of your smart device to those of a seasoned technician. Notably, it’s the sole tool in its category to support CAN FD protocol vehicles, particularly advantageous for post-2020 GM models, streamlining communication and eliminating the need for additional adapters. With a vast database covering over 120 car brands in 10 languages, including bidirectional control functionality, the Thinkdiag2 offers unparalleled versatility in verifying system inputs/outputs without relying on the vehicle’s controls, from throttle modulation to door lock actuator testing. But, By enrolling in an annual membership, you unlock complete access to the entire system and functionality for all compatible car models throughout the subscription’s validity period. Moreover, its ECU coding feature empowers users to unlock hidden features, disable bothersome functions, or recalibrate adaptive data post-repair, while the inclusion of 15+ reset functions—from ABS bleeding to key programming—ensures comprehensive maintenance support. Furthermore, its ability to perform all system diagnoses and retrieve VIN automatically simplifies troubleshooting, providing valuable insights into the vehicle’s health with ease. The Thinkdiag2 also boasts active test capabilities and One-Touch AutoVIN Technology, allowing for full bi-directional control and automatic identification of most car models with just a single click. Its compact design, measuring at 4.8 * 2.7 * 1.1 inches, coupled with an intuitive interface, caters to technicians, DIY enthusiasts, and automotive professionals alike. Compatible with iOS 9.0 and above, as well as Android 5.0 and above systems, the Thinkdiag2 ensures seamless connectivity with your smart device. Included in the package are the Thinkdiag2 Bluetooth Scanner, DB15 to OBD 16pin diagnostic cable, EVA storage bag, and multilingual manuals, enhancing convenience and usability. In conclusion, the Thinkdiag2 Bluetooth OBDII Scanner redefines automotive diagnostics, offering advanced features, extensive car brand coverage, and user-friendly functionality, making it an indispensable tool for technicians and enthusiasts seeking precision and efficiency in vehicle diagnostics.”

Customer Review: “The Xtool D7 is a very powerful and comprehensive diagnostic tool with an 8 PID count for Live Data, with the option of a normal list of graphs or a 2D overlay of all 8 PIDs that allows the filtering out of non relevant PIDs to be able to focus on the freeze frame action of specific PIDs as they interact with the other selected ones. There is also a grip on the slidebar so I can jump to the frame of interest. I prefer the real-time response from the 16 pin VGA style cable. Although the cable can be difficult to manage at times, the 9′ extentiom cable allows me to watch the screen while under the hood. The buffering lag from Bluetooth devices leave me waiting that half second of response time to see the results of my action. With the functions of this mid-level tool, I can pinpoint the the cause of any or all of the components that are out of balance as well as why they are out of balance and by how far. Cleaning or replacing those components can then be verified, compared and recorded for several reasons, such as to check my work or provide a printout of the diagnostic path taken to resolve the issue and bring the system back into balance. At that point, I have spent a small amount money on parts and invested a moderate amount of money on tools, but the abillity to know which circuit could be causing an imbalance of my vehicle is of much more value then paying someone else to fix it for me, and still only wonder wich components or connectors might fail next. If the need for programming should arise, then I will know why, as well as how to minimize or prevent the need for future programming from here on. When every vehicle I’ve ever owned has been pre-owned or built from scrap, lol, and now most vehicles on the road are dependent on transisters to maintain a near perfect balance of the smooth function of that vehicle, then learning the language of electronic control of energy through digital communication becomes a valuable skill that can save the avarage novice a bundle of money on diagnostic and repair costs. The D7 has been a game changer for me, to have the knowledge of the function of my vehicles and maintain that balance for a reasonable investment of studying and observing the components involved and know the costly “what as well as why” answer to most any reason for that light to let me know that an issue IS present. A monthly diagnostic is less painful then a trip to the dentist. The customer service team is very dedicated and responded the very next day. They really do care that have I have purchased the device that will provide me with the level of diagnostic interaction that I am needing to assist me in keeping all of my vehicles in as near perfect balance as financially possible. I know from experience with a Launch X431 pad that I tried to use, that the process to success is to beg the development team for support that may never arrive. This is not the case with Xtool. They are very engaged, as well as knowledgeable to the needs of the customer. I am confident that I have made a logical choice in purchasing the D7 from Xtool, and I believe that you will be amazed at the performance and versatility of Xtool products.”

Customer Review: “This thing is great. Easily reads live data. Can go through and test individual systems. Works quickly. Have used this to diagnose so many vehicles. My friends have used it and then purchased their own.”