Decision guide
Who is Expert 391 more logical for?
Expert 391 may be logical for services that use the device daily but do not immediately need heavy-duty vehicles, advanced modules, or intensive online programming packages. If your service focuses on fault codes, live data, full system scans, maintenance resets, and active tests, the vehicle-based scope of these functions should be central to your purchasing decision.
- Daily scanning and reporting
- Live Data Monitoring
- Active test needs
- List of brands and models to be used
Decision guide
Can Expert 391 be purchased instead of Master?
This question is answered by the list of tasks to be performed, not by price. For a service that will not regularly use the module, programming, and expansion capabilities of the Master level, Expert 391 may be more balanced. However, if online programming, security access, or a specific VCI is required for a particular vehicle, a decision should not be made without confirmation on a model basis.
Decision guide
Efficient workflow with Expert 391
To use the device efficiently, first perform an automatic full scan and report, then verify the fault code with live data. Before active tests or adaptations, check the vehicle battery and service procedure. Establish a workflow that shows the customer the initial and final reports, rather than just clearing the code.
- Initial scan report
- Live data verification
- Secure active test
- Result report
Frequently Asked Questions
Most frequently asked questions by customers
Which services is Thinktool Expert 391 suitable for?
Considered for services performing daily multi-brand scanning, live data, maintenance, and supported active tests. The exact scope should be checked on a vehicle and control unit basis.
What is the main difference between Expert 391 and Master?
Model, VCI, software, modules, and programming scope may differ. Not all functions at the Master level should be automatically assumed for Expert 391.
Does Expert 391 require updates?
Update conditions are important for new vehicle and software scope. The initial included period and renewal fee should be checked according to the purchased package.
Technical Resources
Sources for technical information
Technical information was verified with sources on October 6, 2026.
