You are a busy mechanic or a dedicated DIYer, and you need a reliable OBD2 scanner that can handle full system diagnostics without a trip to the dealer. The Autel brand is a top contender, but with models like the MX808S and MX900, choosing the right one can be tricky. This Autel US review will compare these two powerful tools, helping you decide which scanner delivers the best performance for your workshop or garage in 2026. For a broader look at the market, you might also check our TOPDON ONE review for another bidirectional option.
Buying Guide
Diagnostic Depth and System Coverage
Not all scanners are equal when it comes to system access. You want a tool that reads and clears codes from Engine, ABS, SRS, Transmission, and more. The Autel MX808S and MX900 both deliver OE-level full system diagnostics, covering a wide range of modules. This depth is crucial for accurately pinpointing issues, whether you are dealing with a check engine light or a brake system fault. For more on entry-level options, see our Autel AL319 review.
Bidirectional Active Tests
Bidirectional control is a game changer. The MX808S offers over 3000 active tests, letting you command components like fuel pumps, injectors, and cooling fans directly. The MX900 matches this with its own extensive set of active tests. This feature helps you confirm a faulty part before replacing it, saving time and money. For a different take on bidirectional tools, read our TOPDON AD800BT V2.0 review.
Performance and Speed
A slow scanner wastes your time. The MX808S is powered by a Rockchip RK3566 4-Core CPU with 4GB RAM and Android 11, delivering fast boot times and smooth live data streaming. The MX900 features a 1.8GHz quad-core processor for quick scans. Both models handle Auto VIN and Auto Scan efficiently, but the MX808S offers a notable speed advantage due to its newer hardware architecture. For a comparison with other fast scanners, see our BlueDriver scan tool review.
Service Functions and Vehicle Coverage
Everyday maintenance tasks like Oil Reset, ABS Brake Bleeding, and EPB Reset are essential. The MX808S provides 28+ hot service functions, while the MX900 expands that to 40+ services, covering 99% of daily needs. Both support 150+ vehicle brands, but the MX900 also includes DoIP and CAN-FD protocols for newer models. If you work on electric cars, our best OBD2 scanner for electric cars guide offers additional insights.
Final Thoughts
Choosing between these two Autel scanners comes down to your specific needs. For most DIYers and small workshops, the Autel Scanner MaxiCheck MX808S offers an outstanding balance of speed, bidirectional tests, and value, making it a smart upgrade for 2026. If you require the widest service function set and support for the latest protocols like DoIP, the Autel MaxiCheck MX900 OBD2 Scanner is the more future-proof choice for professional use.
Frequently Asked Questions
What is the difference between Autel MX808S and MX900?
The MX808S is a newer model with a faster processor (Rockchip RK3566) and Android 11, while the MX900 offers more service functions (40+ vs 28+) and supports DoIP and CAN-FD protocols. Both provide full system diagnostics and bidirectional active tests.
Can the Autel MX808S work on my car?
The MX808S covers over 10,000 vehicles from 1996 onward, including US, Asian, and EU makes. However, service functions vary by vehicle, so it is wise to check compatibility with your specific VIN before purchasing.
Does the Autel MX900 require a subscription?
The MX900 includes one year of free software updates. After that, you can continue using existing functions without a subscription. Optional subscriptions are available for future updates and new vehicle coverage.
Are Autel scanners worth the investment in 2026?
Yes, both the MX808S and MX900 offer professional-grade diagnostics and bidirectional testing at a fraction of dealer costs. They are reliable investments for anyone serious about vehicle repair, whether at home or in a workshop. For more on Autel updates, see our autel update review.
