Best OBD-II scanners for mileage check
Last Updated on March 11, 2026 by Juraj
If you are inspecting used cars, a good scanner can sometimes reveal hidden mileage records stored in different control modules.
However, keep in mind that mileage detection with an OBD2 scanner does not work on every car. Some vehicles store mileage data in multiple ECUs, while others only store it in the instrument cluster.
The tools below are the scanners I recommend most for used car inspections and mileage verification. All of them can access multiple control modules and read live data where mileage records are usually stored.
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Quick recommendations
Mucar 892BT
Best overall scanner for used car inspections
The Mucar 892BT is one of the fastest scanners when performing full system scans. It can read live data from all modules and is reliable when checking vehicles before buying.
It also supports ECU coding, service resets and bidirectional testing which makes it useful beyond mileage checks.
TIP: get Mucar endoscope as well to check hard to access spaces in car
iCarsoft CR Max
The iCarsoft CR Max is one of the few scanners that includes a dedicated mileage verification function. Instead of manually opening every control module, the scanner automatically retrieves mileage values stored in different ECUs.
This can save a lot of time during used car inspections.
Thinkcar BD6
This is the best cheap scanner for mileage verification
Thinkcar BD6 is a simple but capable scanner that can access all vehicle modules and read live data. That allows you to search for mileage parameters stored in different ECUs.
For basic diagnostics and used car inspections it offers excellent value.
Best OBD2 scanners for used car check
ICarsoft CR Max
iCarsoft CR Max includes a dedicated mileage verification service function which automatically retrieves mileage values stored in multiple ECUs. It supports full system diagnostics, live data and bi-directional tests.
Mucar 892BT
The Mucar 892BT is one of the fastest scanners for full system diagnostics and is very reliable during used car inspections. It supports ECU coding, bi-directional testing and quick module scanning.
(10% OFF with “CARHACKER” on official website)
Thinkcar BD6
Thinkcar BD6 is one of the most affordable scanners that can still access all control modules and read live data. This makes it capable of searching for hidden mileage records stored inside ECUs.
(10% OFF with “CARHACKER” on official website)
Thinkdiag2
Thinkdiag2 turns a smartphone into a powerful diagnostic tool with full system diagnostics, ECU coding and many service procedures. It supports deep vehicle diagnostics but requires a subscription after the first year.
(10% OFF with “CARHACKER” on official website)
Youcanic OBD2 scanner + inspection camera
Youcanic scanner provides stable full system diagnostics and live data access. When combined with an inspection endoscope it becomes a powerful setup for used car inspections and checking hidden engine components.
XTool A30M
Xtool A30M is a Semi-professional scanner for smartphone/tablet. Full-system scan, live data, service resets, and bi-directional testing.
(10% OFF with “CARHACKER” on official website)
Why mileage verification requires a full system scanner
When checking mileage with an OBD2 scanner you are not reading the value from the dashboard.
Instead, you are searching for mileage records stored inside different control modules.
Common modules where mileage data may appear include:
- engine ECU
- ABS module
- infotainment system
- gateway module
- transmission ECU
- body control module
If the mileage stored in one of these modules is significantly higher than the dashboard value, it may indicate that the odometer was rolled back.
However this method does not work on every vehicle, because some cars do not store mileage records outside the instrument cluster.
To understand the full process of verifying mileage using diagnostic tools you can read this guide:
How to check real car mileage using an OBD2 scanner
Related mileage verification procedures
Below are real diagnostic procedures where ECU data was used to analyze vehicle mileage.
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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.
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