Product information
What is the Thinktool Expert 391 used for?
The Thinktool Expert 391 is a professional model for services comparing advanced needs such as DoIP, CAN FD, and online programming within the Thinkcar Expert family.
Thinkcar · Vehicle Diagnostic Devices
Thinktool Expert 391
Thinkcar Expert model for workshops needing DoIP, CAN FD, and online programming.
- DoIP/CAN FD
- Online programming
- Professional service
≈ $1,49573,872 TL charged · VAT included · import duties excluded
In stockThe TRY price includes Turkish VAT. Import duties and local taxes are not included.View installment options2–6 installments
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The exact plan and total amount will be shown again at the payment step.
- Invoiced Product
- Authorized Dealer
- Guaranteed in Turkey
What would you buy this for?
- DoIP/CAN FD protocols
- Online programming
- Professional workshop use
Featured diagnostic features
- Protocol support
- Programming coverage
- Vehicle Group
Vehicle Coverage
What vehicles does the Thinktool Expert 391 support?
The make name alone does not guarantee compatibility. Within the same make, model year, engine, chassis, control unit, communication protocol, and intended operation can yield different support results.
- Vehicle Group
- Passenger cars and light commercial vehicles included in the product software
- Supported makes
- Multi-brand coverage; the current make list is obtained from the manufacturer's official vehicle or protocol database.
- Supported models
- Verified from the official coverage screen based on make, model, model year, engine or chassis, and control unit.
- Scope of service
- Code reading, live data, active test, service function, coding, and programming may be supported separately.
- Connection conditions
- Protocol support, Programming coverage, Vehicle group
- The make and model examples on the page do not guarantee all production years and all functions.
- Before any definitive operation, the manufacturer's current coverage record must be verified with the VIN or full vehicle information.
Product details
What expectation does the Expert 391 meet?
Protocol support, programming coverage, and the vehicle groups regularly serviced are the primary selection criteria for the Expert 391. Services seeking passenger car, commercial, and EV packages together should also compare the Expert 394 AI model.
- DoIP/CAN FD
- Programming coverage
- Vehicle Group
Product details
What is the Expert 391 model used for?
The Expert 391 model reads data from vehicle control units, executes supported diagnostic commands, and records the service result. Its main applications and hardware features include: DoIP/CAN FD, online programming, and professional service.
The service menus that can be opened on the Expert 391 model device vary depending on the make, model, year, control unit, and installed software package.
- DoIP/CAN FD
- Online programming
- Professional service
- Product Type
- Vehicle diagnostic tools
- Usage level
- Professional
- Basic functions
- DoIP/CAN FD and Online programming
Product details
What do the Expert 391 model features provide in daily work?
The DoIP/CAN FD on the Expert 391 model determines the device's connection or hardware structure. Protocol support indicates the device's physical usage or vehicle connection conditions. Online programming with the Expert 391 model is applied only to control units supported in the manufacturer's current vehicle and function list.
Existing software or settings are saved first; vehicle voltage, internet, and VCI connection are maintained until writing is completed. The Expert 391 model performs vehicle selection, system scanning, and service recording within the professional service workflow on the same device. The vehicle group is based on the make, model, year, and system list published by the manufacturer.
After the technician prepares the Expert 391 connection, they save the initial scan, apply the selected function according to the manufacturer's procedure; they save the initial finding, the performed service, and the final check in the same service report. The opening of a menu on the Expert 391 screen does not solely indicate that the service is completed or the fault is resolved.
- Protocol support
- Programming coverage
- Vehicle Group
Product details
Online programming with the Expert 391 model
Before online programming begins with the Expert 391 model, the vehicle, control unit, and software package to be used are verified. The Expert 391 saves the existing coding or software information as a rollback record. For the Expert 391, the vehicle, model year, control unit, and writing function are verified in the current list published by Thinkcar.
Throughout the service, vehicle voltage is kept stable with a suitable power supply; the Expert 391 is used without interruption of internet and VCI connection. In the final scan, this device reports the writing result along with the control unit status and error logs.
- Verify vehicle and control unit
- Save existing software information
- Maintain stable connection with voltage
- Obtain final scan after programming
Product details
Initial system scan upon vehicle acceptance with the Expert 391 model
When performing an initial system scan upon vehicle acceptance with the Expert 391 model, the vehicle identity is verified, and supported control units are scanned. The Expert 391 saves the communicating systems, fault codes, and accessible event information together in the initial report.
The VCI model, software version, and vehicle identity used with the Expert 391 are added to the vehicle acceptance record. Codes are not cleared before the Expert 391 initial report is obtained; a single error record does not directly lead to a part replacement decision. The Expert 391 intake scan is added to the service form, specifying the customer complaint and systems to be monitored.
- Verify vehicle identity
- Save the initial system scan
- Check protocol support information
- Re-scan after service operation
Product details
Live data recording under fault conditions with the Expert 391 model
Live data recording under fault conditions with the Expert 391 model is initiated by defining a safe operating condition where the customer complaint occurs. Only data channels related to the fault are selected on the Expert 391 screen; unnecessary PIDs are excluded from the recording.
The Expert 391 model saves live data with measurement units; operating conditions such as vehicle identity, test time, engine speed, load, and temperature are added to the recording. The technician interprets sudden changes on the Expert 391 along with fault codes and event logs; a single value does not directly lead to a part replacement decision.
After repair, a second data recording is taken under the same conditions with the Expert 391, and the two results are compared side-by-side.
- Define test conditions
- Select relevant PIDs
- Record data with units
- Compare under the same conditions after repair
Product details
Review fault code and event log together with the Expert 391 model
When reviewing fault codes and event logs together with the Expert 391 model, the recorded and current error codes of the relevant control unit are read first. The Expert 391 saves accessible event data such as RPM, temperature, voltage, or mileage at the time of the fault in the same report as the code.
Vehicle identity, control unit, and software version are added to the Expert 391 service form. The technician compares the Expert 391 data with the customer complaint and physical test results; the event log alone does not identify the faulty part. Upon completion of the Expert 391 review, whether the code was cleared and the next check step are recorded.
- Verify vehicle identity
- Save the initial system scan
- Check protocol support information
- Re-scan after service operation
Product details
How to verify vehicle coverage for the Expert 391 model?
Definitive compatibility cannot be stated for the Expert 391 model without selecting the vehicle make, model, year, engine, control unit, and the intended service together. The Thinkcar official coverage tool shows which systems, service functions, or protocols are enabled for the selected vehicle and control unit for the Expert 391.
The appearance of the brand line does not prove that active tests, coding, programming, TPMS relearn, or security gateway access are also enabled on the Expert 391.
Before ordering, prepare the VIN or full model information, model year, engine/chassis distinction, and the intended service for the Expert 391; software version, license period, VCI, adapter, and regional package must also be checked.
- Expert 391 model: prepare make, model, model year, and engine/chassis information
- Expert 391 model: select desired system and service separately; read, live data, active test, coding, or programming
- Expert 391 model: verify ECU and function line in the official coverage tool
- Expert 391 model: check VCI, cable, adapter, license, and regional package conditions
- Expert 391 model: perform final check with VIN and manufacturer procedure before definitive service
Product details
Expert 391 model technical specifications and compatibility information
Protocol support, programming coverage, and vehicle group determine the daily usage, software access, and delivered package of the Expert 391 model device. The applicability of these usage areas on the Expert 391 model depends on the installed vehicle software and the relevant control unit, in addition to the device hardware.
For the Expert 391, make, model, year, and system support are read from the manufacturer's current vehicle and function list. Screen, connection, protocol, battery, and software specifications are limited to the official technical data published for the Expert 391 model.
The opening of a specific vehicle menu on the Expert 391 screen does not indicate that the service preconditions are met or the fault is resolved.
- Protocol support: Official technical documentation and product label are used for the Expert 391 model.
- Programming coverage: Official technical documentation and product label are used for the Expert 391 model.
- Vehicle group: For the Expert 391 model, the manufacturer's current list based on make, model, year, and system is used.
Product details
What nearby products can the Expert 391 model be compared with?
The choice between the Expert 391 model and the Thinktool Expert 191 Diagnostic Tool, Thinktool Expert 195, Thinktool Expert 394 AI, and Thinktool Expert 399 is made based on supported functions, connection, and package differences.
The number and AI label in the Expert family do not mean the devices have the same hardware; each model's hardware, VCI structure, and supported functions are evaluated separately. For the Expert 391 model, protocol support, programming coverage, and vehicle group are the primary selection criteria.
The connection method, protocol support, software coverage, and additional modules of the devices compared with the Expert 391 model are not the same. The vehicle and control unit support required for online programming is read from the current list published by the manufacturer for the Expert 391 model.
A device that does not offer the required function or connection for online programming on the Expert 391 model is not suitable for this service task, even if it is more comprehensive in other areas.
- Thinktool Expert 191 Diagnostic Tool: full system scan and bi-directional active test
- Thinktool Expert 195: maintenance functions and coding needs
- Thinktool Expert 394 AI: passenger and commercial vehicles and EV package
- Thinktool Expert 399: AI-assisted diagnostics and passenger and commercial vehicles
Product details
How is the Expert 391 model used in service?
Work with the Expert 391 model begins by writing the vehicle or equipment identity and the DoIP/CAN FD request into the work order. The technician prepares the protocol support conditions and saves the initial scan or connection test with the Expert 391 model.
Only the relevant system is opened on the Expert 391 model; if there is an active command or writing operation, vehicle voltage is monitored throughout the service. After the application is completed, the Expert 391 model scans the same system again. The vehicle group, initial record, and the service performed with the Expert 391 model are shown together in the service report.
- Save initial status for DoIP/CAN FD
- Prepare protocol support conditions
- Apply DoIP/CAN FD service according to manufacturer procedure
- Re-check service result with the Expert 391 model after service
Product details
Expert 391 model package, software, and update structure
The Expert 391 model package may consist of the tablet or main device, VCI or connection cable, power components, adapters, and carrying equipment; the exact scope is specified with names and quantities in the package contents. Protocol support, programming coverage, and vehicle group are checked against the delivered set.
Optional modules in the manufacturer's image are included in the standard package only if explicitly stated in the Expert 391 package contents. The included software period and warranty period are different conditions. When renewing the Expert 391 software, the device serial number and the license offered for this model are used.
- Expert 391 model main product
- Protocol support
- Cable, adapter, and power components
- Included software or application information
- Separate display of warranty and update periods
Related pages
Relevant content for Thinktool Expert 391
Thinkcar ProductsExamine Thinkcar diagnostic devices and Thinktool models together.Vehicle diagnostic toolsCompare devices based on service level, vehicle coverage, and intended use.Automotive diagnostic tool selectionWhen selecting a device, check vehicle coverage, service functions, and license terms.Thinktool Expert 191 Diagnostic DeviceCompare the Expert 391 model with the Thinktool Expert 191 Diagnostic Tool model in terms of full system scan, bi-directional active test, and package structure.Thinktool Expert 195Compare the Expert 391 model with the Thinktool Expert 195 model in terms of maintenance functions, coding needs, and package structure.Thinktool Expert 394 AICompare the Expert 391 model with the Thinktool Expert 394 AI model in terms of passenger and commercial vehicles, EV package, and package structure.Thinktool Expert 399Compare the Expert 391 model with the Thinktool Expert 399 model in terms of AI-assisted diagnostics, passenger and commercial vehicles, and package structure.Thinktool Expert 191, 195, 391, 394 AI, and 399 comparisonCompare Thinktool Expert 191, 195, 391, 394 AI, and 399 models based on hardware, VCI, measurement, AI-assisted workflow, and professional service role.
Technical Resources
Technical resources for the Thinktool Expert 391
Technical information verified with official sources on October 6, 2026.
FAQ
Frequently asked questions about the Thinktool Expert 391
What is the Expert 391 model used for?
The Expert 391 model is a professional-level diagnostic device used for DoIP/CAN FD, online programming, and professional service. Protocol support, programming coverage, and vehicle group indicate the vehicle, connection, and package selection conditions for the Expert 391.
If a service to be performed with the Expert 391 model is not found in the manufacturer's current vehicle and function list, it is not considered a standard feature.
Does the Expert 391 model offer the same functions on every vehicle?
No. The vehicle and service coverage on the Expert 391 model is determined by make, model, year, control unit, and the installed software package. The manufacturer's official vehicle and function list is used for the Expert 391. The list shows the Expert 391 functions on a vehicle and control unit basis.
What steps are followed during the first use of the Expert 391 model?
During the first use of the Expert 391 model, the model label, tablet charge, VCI or OBD cable, account, and software version are recorded. After checking protocol support, a connection is established with the vehicle. The first attempt is completed with read and scan operations for DoIP/CAN FD instead of a write command; the obtained report is saved.
Does the Expert 391 model require updates or a license?
The Expert 391 model is a software-based product; the included update period and renewal conditions are shown for the purchased package. Campaigns offered for the Expert 391 in another country are not automatically applied to the Turkish sales package. The device account, serial number, and current Expert 391 version are recorded upon delivery.
What parts are included in the Expert 391 model package?
The Expert 391 model package includes only the physical parts specified by name and quantity in the package contents. If optional modules, cables, or accessories seen with the Expert 391 model in the manufacturer's image are not included in the package contents, they are not part of the standard package. Upon delivery, protocol support, serial number, and physical parts are compared with the order record.
Is the Expert 391 model suitable for professional service?
The Expert 391 model is used in services performing DoIP/CAN FD, online programming, and professional service at a professional usage level. The daily vehicle or service count and the need for protocol support must match the hardware and software capacity of the Expert 391. The Expert 391 cannot be used alone for tasks requiring additional equipment.
What products can be compared instead of the Expert 391 model?
Thinktool Expert 191 Diagnostic Tool, Thinktool Expert 195, Thinktool Expert 394 AI, and Thinktool Expert 399 are similar models that can be evaluated in the same job class as the Expert 391 model. Models are compared based on protocol support, programming coverage, vehicle group, box contents, and daily usage intensity.
Expert 391 is a different device, but not considered an alternative due to its similar price.
Comparison
Thinktool Expert 391 Similar Models
Compare products in the same class with information on usage level, service tasks, and price.
| Model | Level | Usage | Price | View |
|---|---|---|---|---|
| Thinktool Expert 391Thinkcar | Professional |
| ≈ $1,49573,872 TL charged · VAT included · import duties excluded | View |
| Thinktool MasterThinkcar | Professional |
| ≈ $1,00249,500 TL charged · VAT included · import duties excluded | View |
| Thinktool ProsThinkcar | Service |
| ≈ $1,11154,900 TL charged · VAT included · import duties excluded | View |
| Thinktool Reader 7Thinkcar | Getting started |
| ≈ $26112,900 TL charged · VAT included · import duties excluded | View |
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