Best OBD2 scanners for mileage check | Find mileage frauds!
Last Updated on April 12, 2026 by Juraj
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
Full comparison
The Thinkcar BD6 is entry-level thinkcar bluetooth scanner more capable than simple ELM adapters.
- Lifetime free updates included
- Above average value for money (10/10)
- Above average UX quality (8/10)
The Mucar 892BT is my personal favourite go-to scanner for diagnosing, checking used cars. service resets or even coding new features. Unless I need special tool I am using this one..
- Lifetime free updates included
- Above average UX quality (10/10)
- Above average service functions (9/10)
- Above average ease of use (10/10)
The XTool A30M is best overall value for money for Bluetooth OBD2 scanner..
- Lifetime free updates included
- Above average ease of use (9/10)
- Above average build quality (9/10)
- Above average value for money (10/10)
The Youcanic UCAN-II full-system is full-system scanner from youcanic with bidirectional and coding aimed at DIY users wanting professional features.
- Lifetime free updates included
- Above average diagnostics (8/10)
- Above average speed (8/10)
- Above average UX quality (8/10)
The Thinkdiag2 is most advanced bluetooth OBD2 scanner for smartphone users with full-system access and coding.
- Above average vehicle coverage (9/10)
- Above average service functions (8/10)
- Above average build quality (9/10)
- Above average diagnostics (8/10)
The iCARSOFT CR max is straightforward full-system tablet that covers all the basics without being the most feature-dense option in its price range.
- Lifetime free updates included
Feature comparison
|
Best Budget
Thinkcar BD6
|
Best Features
Mucar 892BT
|
Best Value
XTool A30M
|
Best for Beginners
Youcanic UCAN-II full-system
|
Thinkdiag2
|
iCARSOFT CR max
|
|
|---|---|---|---|---|---|---|
| Overall score | 8.4
|
9
|
9
|
8.4
|
7.9
|
7.3
|
| Tool type | Standalone device | Standalone device | Standalone device | Standalone device | Standalone device | Standalone device |
| User level | Intermediate | Professional | Intermediate | Advanced | Professional | Advanced |
| Vehicle focus | All makes | All makes | All makes | All makes | All makes | All makes |
| System focus | All systems | All systems | All systems | All systems | All systems | All systems |
| Global OBD | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Full system codes | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Live data (full) | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Bidirectional | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Coding | ✗ | ✓ | ✗ | ✓ | ✓ | ✓ |
| ECU programming | ✗ | ~ | ✗ | ✗ | ~ | ✗ |
| Diagnostics | 6/10 | 8/10 | 7/10 | 8/10 | 8/10 | 7/10 |
| Service score | 4/10 | 9/10 | 7/10 | 7/10 | 8/10 | 6/10 |
| Coding score | — | 9/10 | — | 8/10 | 8/10 | 7/10 |
| Ease of use | 8/10 | 10/10 | 9/10 | 8/10 | 7/10 | 6/10 |
| Price / value | 10/10 | 10/10 | 10/10 | 9/10 | 9/10 | 8/10 |
| Free updates | Lifetime free updates | Lifetime free updates | Lifetime free updates | Lifetime free updates | 1 year free updates | Lifetime free updates |
| Subscription | Not required | Not required | Not required | Not required | Required | Not required |
| Verdict | entry-level thinkcar bluetooth scanner more capable than simple ELM adapters | My personal favourite go-to scanner for diagnosing, checking used cars. service resets or even coding new features. Unless I need special tool I am using this one. | Best overall value for money for Bluetooth OBD2 scanner. | full-system scanner from youcanic with bidirectional and coding aimed at DIY users wanting professional features | most advanced bluetooth OBD2 scanner for smartphone users with full-system access and coding | straightforward full-system tablet that covers all the basics without being the most feature-dense option in its price range |
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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.
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.
How to Check Real Mileage – Skoda Rapid 2019 (OBD2)
Verifying real mileage on Skoda Octavia MK3– case study using OBD2 live dataMost popular OBD2 guides
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