Best Bluetooth Bi-Directional Scanners in 2025/2026
I believe the J2534 adapters are the future of car diagnostic tools for home mechanics as they can give you professional OBD-II functionality for a cheap entry price. Here is the list of my favourite ones.
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Quick recommendations:
Mucar BT200 Max
The Mucar BT200 Max offers full-system scans, bi-directional testing, service resets, and an AI assistant with free lifetime updates. It also works as an ELM327 adapter for use with hundreds of apps.
(10% OFF with “CARHACKER” on official website)
XTool A30M
The XTool A30M stands out with 26 service resets, full-system access, and bi-directional tests. It’s easy to use and comes with free lifetime updates.
(10% OFF with “CARHACKER” on official website)
Thinkdiag2
The Thinkdiag2 delivers full-system diagnostics, service resets, bi-directional tests, plus ECU coding to unlock or disable hidden features.
(10% OFF with “CARHACKER” on official website)
Topdon Topscan Lite
The Topdon Topscan Lite creates clean car health reports, does full-system scans, service resets, and bi-directional tests. Upgrade to Topscan PRO for more resets.
Konwei KDiag
The Konwei KDiag is a budget option with full-system diagnostics and bi-directional tests on supported cars, plus affordable pricing on Aliexpress. (cheap but limited brand coverage)
Best Bluetooth Bi-Directional scanners list
1. Mucar BT200 Max
Mucar 200BT Max
I love this tool haha. Not only it gives you access to professional software with full-system diagnostics, it will also let you work with ELM327 apps.
So just with Mucar 200BT Max you can use wide range of professional and 3rd party apps.
Find the best price
2. XTool A30M
XTool A30M
XTool A30M is one of the best choices for DIY mechanics as you are getting scan tool functionality for cheap price.
I bought the cheapest of 3 different A30 versions on Aliexpress for around $96 and it comes with an extension cable, free lifetime updates, and all the functionality I might need as a home mechanic.
Find the best price
3. Thinkdiag2
Thinkdiag2
Thinkdiag2 s the fastest wireless OBD2 scanner I’ve tested. It covers everything a beginner or intermediate DIY mechanic needs, with wide vehicle coverage and advanced features rarely found in smartphone scanners.
You get bi-directional testing, ECU coding (enable/disable features), and access to every control module for scanning, live data, and detailed parameters.
Find the best price
(Think car Thinkdiag2 and Kingbolen Ediag are the same tools)
4. Topscan Lite/Pro
Topdon TopScan
I used Topscan for the first time and not only the connection and setup was extremely easy, but I also tried it with 3 different vehicles (video below) and everything worked flawlessly.
Topscan is currently the cheapest way that I know of, how you can add a Bi-Directional scan tool to your tool set.
Even though it has some cons mentioned below, I still think it is an amazing deal considering the price.
Find the best price
5. Konwei Kdiag
Konwei KDIAG
Konwei KDIAG is not the best bi-directional scanner but given it’s low price and free updates, it is even cheaper than most engine code readers or ELM327 adapters.
And it comes with features they do not have, like full scan or bi-directional testing.
Find the best price
Popular OBD2 guides
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Best OBD2 scanners in 2025
I constantly test new OBD-II scanners to give you the best options possible. Here is a full list of the best tools in all categories currently.
Good day, sir.
Thank you for all the great vids you post, Ives seen and liked a lot of them.
Ii recently watched your video on scanners that have capabilities to see if mileage has been tampered with , you reviewed the Thinkdiag 2, OBDEleven and Carly.
I wanted to ask if you know if the Thinkcar BD6 also has the capabilities to check mileage as it appears to be the cheapest of the lot and also requires no subscription. Im not a mechanic but do services at home alone and so would like an affordable device that can read and delete codes and reset service lights, brake calipers etc. also when I buy a car for myself would like to know if the mileage has been tampered with. The BD6 seems reasonable in capability and price but would be a bonus if it could assist in the mileage issue.
Your advice would be appreciated.
Regards
Stefan Belovic from South Africa
Hello yes it has full-system diagnostics so it will be able to read mileage records (if car stores them of course)