Best Bi-directional Scan Tools
A bi-directional OBD2 scanner allows you to actively test and control vehicle components, making it an essential tool for mechanics and DIYers. This feature enables you to:
- Activate fuel injectors, fans, throttle actuators, and more.
- Perform functional tests to ensure components are working properly.
- Reset and calibrate systems like TPMS, SAS, EPB, and oil service lights.
Choosing the right bi-directional OBD2 scan tool depends on your budget, vehicle compatibility, and additional features like ECU coding or ECU programming for more advanced needs.
Best Budget Bidirectional Scan Tool:
Our top budget-friendly picks include TOPDON TopScan Pro， Autel MaxiCOM MK808S and Launch CRP919X. Each scanner in our selection offers essential features for efficient diagnostics, including all-system diagnostics, comprehensive service functions, Full bi-directional control, AutoVIN, and Basic ECU Coding (Launch CRP919X only).
| Tool | Best For | Key Features | Price |
|---|---|---|---|
| TOPDON TopScan Pro | DIYers & beginners | Bi-directional control, full-system diagnostics, 13 reset functions and IMMO programming |
$89.00 |
| Autel MaxiCOM MK808S | DIYers & entry-level mechanics | Bi-directional control, 28 reset functions, fast processor |
$359.00 |
| Launch Creader CRP919X | Professional technicians | Bi-directional control, 35+ Maintenance Functions, ECU coding |
$399.00 |
| TOPDON ArtiDiag AD900BT | Professional mechanics | Bi-directional Control, 28+ Reset Functions, ECU coding for VW，Audi，Skoda，Seat，Porsche，BMW，Mini |
$449.00 |
Advanced OBDII Scanners with Bi-Directional Control, ECU Coding, and ECU Programming:
If you’re a professional technician or an advanced mechanic, these high-end tools offer enhanced diagnostic capabilities. Our top models provide cloud-based ECU programming, bi-directional control, and ECU coding, allowing you to tackle the most complex automotive diagnostics. The models listed below offer:
- Full Bi-Directional Control: Activate and test components across all systems for precise diagnostics.
- Advanced System Calibrations: Perform complex tasks such as throttle body adaptations, transmission resets, and injector relearns.
- ECU Coding: Modify vehicle software to optimize performance or to fix faults on supported vehicles.
- Key Programming: Program new keys and reset immobilizers to ensure complete vehicle security.
- ECU Programming: Perform cloud-based or online ECU programming, for the latest software and updates.
| Tool | Best For | Extra Features | Update | Price |
|---|---|---|---|---|
| TOPDON Phoenix Lite 3 | Professional mechanics | Bi-directional Control, 36 Reset Functions, ECU Coding, Offline ECU Programming. | 2 Years Free, $495/Y | $719 |
| TOPDON Phoenix Elite | Advanced workshops | Bi-directional Control, ECU Coding, Cloud-based programming for 9 brands (Audi, Benz, VW, BMW, SKODA, SEAT, Nissan, Hyundai, Kia) | 2 Years Free, $499/Y | $1,499 |
| TOPDON Phoenix Smart | High-end workshops | Advanced Bi-directional Functions, 42 Reset Functions, Cloud-based Programming for 17 Brands, Includes J2534 programming, Wide add-on module support. |
2 Years Free, $499/Y |
$2,199 |
| Autel MaxiSys Elite II Pro | Professional technicians |
Bi-directional Control, Advanced Diagnostics, ECU Coding, Online ECU Programming for BMW&Benz, J2534 pass-thru supported |
2 Years Free, $849/Y | $2,039 |
| Autel MK908 Pro II | Auto repair shops |
Advanced Bi-directional Functions, ECU Programming for BMW & Benz, J2534 Programming Support |
1 Year Free, $759/Y | $1,649 |
| Autel Ultra Series | Dealership-level diagnostics |
Bi-directional Control, Advanced Diagnostics, ECU Coding, Online ECU Programming for BMW&Benz, J2534 pass-thru supported |
1 Year Free, $855/Y | $2,899 - $3,999 |
| Launch X431 Pro5 | Professional technicians | Bi-directional Control, ECU Coding, Online Programming for BMW & Benz, J2534 Support | 2 Years Free, $510/Y | $1,199 |
| Launch X431 Pad VII | High-end auto shops |
Advanced Bi-directional Control, Online Programming for 15 Brands, J2534 support. |
2 Years Free, $899/2Y | $2,279 |
How to Choose the Right Bi-Directional Scan Tool?
✅ Need basic diagnostics and bi-directional control? → Consider tools like the TOPDON TopScan Pro, Autel MK808S, or Launch CRP919X for entry-level tasks.
✅ Want professional-level bi-directional testing with ECU coding? → Try the TOPDON Phoenix Lite 3, Autel MaxiCom MK908 Pro II, or Launch X431 Pro5.
✅ Need advanced bi-directional functions and ECU programming? → The Launch X431 Pad VII (with 15 brands online programming), Autel Ultra Series (BMW/Benz, 30+ brands, J2534), or TOPDON Phoenix Smart (17 brands cloud-based programming) will be ideal.
DISCOVER UNBEATABLE DEALS ON HIGH-QUALITY, BI-DIRECTIONAL SCANNERS! DON'T MISS OUT ON THESE AMAZING PRICES!
Contact Us for Scanner Advice
FAQs
They are identical products with the same functions.
Autel MaxiCOM MK808 has been updated in June, 2022, adding $300+ worth of NEW features while maintaining the same price. New features include bi-directional control, FCA Auto Auth, and more service functions.
Feel free to send us your VIN number by chat or Email anytime, we will be happy to help you check the compatibility.
Or you can find it out on Auteltech website: https://autel.com/vehicle-coverage/coverage2
Compared with MS906BT/MS908/MK908, Autel Maxisys MS906 offers the same diagnostic functions, but is more affordable, more portable and supports more vehicles (Up to 10,000 models)