Autel MaxiCheck MX900 Bidirectional Scan Tool
Where we recommend it
OBD2 Scan Tools for a Modern Engine Swap, at Three Budgets·#3
A bidirectional scan tool: it sends commands to the car's modules, so a part can be tested from the scanner instead of only read about.
Estimated retail value
$559.00
As of Oct 25, 2026
About it
Autel's MaxiCheck MX900 is an all-in-one bidirectional scan tool. Beyond reading and clearing codes, a bidirectional tool sends commands to a vehicle's control modules so components can be tested from the scanner rather than only read. It is sold on its own or bundled with Autel's MV108S inspection camera, which reaches into places a scanner cannot see.
Also in OBD2 Scan Tools for a Modern Engine Swap, at Three Budgets
1
Autel AutoLink AL319 OBD2 Code Reader
Reads and clears engine codes, shows live data and freeze frame, and checks emissions readiness. It powers from the port, so it lives in the glovebox.
2
Autel MaxiLink ML629 OBD2 Scanner
Adds transmission, ABS and airbag codes to the engine's, with live data graphed, for a build that carried a modern transmission controller or ABS over with the swap.
Where these picks come from: AUTELOnline